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1 line
82 KiB
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class="ic i-angle-right"></i> <span itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"><a href="/categories/%E5%B7%A5%E4%BD%9C/" itemprop="item" rel="index" title="分类于 工作"><span itemprop="name">工作</span></a><meta itemprop="position" content="1"></span><i class="ic i-angle-right"></i> <span class="current" itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"><a href="/categories/%E5%B7%A5%E4%BD%9C/KLineChart/" itemprop="item" rel="index" title="分类于 KLineChart"><span itemprop="name">KLineChart</span></a><meta itemprop="position" content="2"></span></div><article itemscope itemtype="http://schema.org/Article" class="post block" lang="zh-CN"><link itemprop="mainEntityOfPage" href="https://hitoli.com/2023/01/31/KLineChart%E7%94%BB%E6%B3%A2%E6%AE%B5%E9%AB%98%E4%BD%8E%E4%BB%B7%E5%9B%BE/"><span hidden itemprop="author" itemscope itemtype="http://schema.org/Person"><meta itemprop="image" content="/images/avatar.jpg"><meta itemprop="name" content="Hito Li"><meta itemprop="description" content="天下事有难易乎？为之，则难者亦易矣, 天生我材必有用"></span><span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization"><meta itemprop="name" content="涛声依旧"></span><div class="body md" itemprop="articleBody"><h4 id="引言"><a class="anchor" href="#引言">#</a> 引言</h4><p>使用指定数据方式得到的线条总是不能达到想要的效果，一是阶梯线在价格发生变化的点存在倾斜，二是高低价的线很难完美显示，所以只能自己动手画了。代码仅供参考，如有错误的地方请指正！<br><img data-src="https://nas.hitoli.com:18014/images/2023/01/31/ee3c75b472c5869794e205747703d888.png" alt="ee3c75b472c5869794e205747703d888.png"></p><h4 id="模版代码"><a class="anchor" href="#模版代码">#</a> 模版代码</h4><figure class="highlight js"><figcaption data-lang="JavaScript"></figcaption><table><tr><td data-num="1"></td><td><pre><span class="token keyword">this</span><span class="token punctuation">.</span>chart<span class="token punctuation">.</span><span class="token function">addTechnicalIndicatorTemplate</span><span class="token punctuation">(</span><span class="token punctuation">{</span></pre></td></tr><tr><td data-num="2"></td><td><pre> <span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'BandHighLowInd'</span><span class="token punctuation">,</span></pre></td></tr><tr><td data-num="3"></td><td><pre> <span class="token literal-property property">shortName</span><span class="token operator">:</span> <span class="token string">'波段高低价'</span><span class="token punctuation">,</span></pre></td></tr><tr><td data-num="4"></td><td><pre> <span class="token literal-property property">calcParams</span><span class="token operator">:</span> <span class="token punctuation">[</span><span class="token punctuation">{</span> <span class="token literal-property property">value</span><span class="token operator">:</span> <span class="token number">10</span> <span class="token punctuation">}</span><span class="token punctuation">]</span><span class="token punctuation">,</span></pre></td></tr><tr><td data-num="5"></td><td><pre> <span class="token literal-property property">precision</span><span class="token operator">:</span> <span class="token number">2</span><span class="token punctuation">,</span></pre></td></tr><tr><td data-num="6"></td><td><pre> <span class="token literal-property property">plots</span><span class="token operator">:</span> <span class="token punctuation">[</span></pre></td></tr><tr><td data-num="7"></td><td><pre> <span class="token punctuation">{</span> <span class="token literal-property property">key</span><span class="token operator">:</span> <span class="token string">'high'</span><span class="token punctuation">,</span> <span class="token literal-property property">title</span><span class="token operator">:</span> <span class="token string">'高: '</span><span class="token punctuation">,</span> <span class="token function-variable function">color</span><span class="token operator">:</span> <span class="token punctuation">(</span><span class="token parameter">data<span class="token punctuation">,</span> options</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span> <span class="token keyword">return</span> options<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors<span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span> <span class="token punctuation">}</span> <span class="token punctuation">}</span><span class="token punctuation">,</span></pre></td></tr><tr><td data-num="8"></td><td><pre> <span class="token punctuation">{</span> <span class="token literal-property property">key</span><span class="token operator">:</span> <span class="token string">'low'</span><span class="token punctuation">,</span> <span class="token literal-property property">title</span><span class="token operator">:</span> <span class="token string">'低: '</span><span class="token punctuation">,</span> <span class="token function-variable function">color</span><span class="token operator">:</span> <span class="token punctuation">(</span><span class="token parameter">data<span class="token punctuation">,</span> options</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span> <span class="token keyword">return</span> options<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span> <span class="token punctuation">}</span> <span class="token punctuation">}</span><span class="token punctuation">,</span></pre></td></tr><tr><td data-num="9"></td><td><pre> <span class="token punctuation">{</span> <span class="token literal-property property">key</span><span class="token operator">:</span> <span class="token string">'highLow'</span><span class="token punctuation">,</span> <span class="token literal-property property">title</span><span class="token operator">:</span> <span class="token string">'高低: '</span><span class="token punctuation">,</span> <span class="token function-variable function">color</span><span class="token operator">:</span> <span class="token punctuation">(</span><span class="token parameter">data<span class="token punctuation">,</span> options</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span> <span class="token keyword">return</span> options<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span> <span class="token punctuation">}</span> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="10"></td><td><pre> <span class="token punctuation">]</span><span class="token punctuation">,</span></pre></td></tr><tr><td data-num="11"></td><td><pre> <span class="token function-variable function">calcTechnicalIndicator</span><span class="token operator">:</span> <span class="token punctuation">(</span><span class="token parameter">dataList<span class="token punctuation">,</span> <span class="token punctuation">{</span> params <span class="token punctuation">}</span></span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="12"></td><td><pre> <span class="token keyword">let</span> compareKlineSize <span class="token operator">=</span> params<span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span> <span class="token comment">// 取前后 k 的范围</span></pre></td></tr><tr><td data-num="13"></td><td><pre> <span class="token keyword">let</span> highs <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span></pre></td></tr><tr><td data-num="14"></td><td><pre> <span class="token keyword">let</span> lows <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span></pre></td></tr><tr><td data-num="15"></td><td><pre> <span class="token keyword">let</span> highLows <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span></pre></td></tr><tr><td data-num="16"></td><td><pre> <span class="token keyword">let</span> findHigh <span class="token comment">// 高低价当前查找标识</span></pre></td></tr><tr><td data-num="17"></td><td><pre> dataList<span class="token punctuation">.</span><span class="token function">forEach</span><span class="token punctuation">(</span><span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token parameter">kLineData<span class="token punctuation">,</span> i</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="18"></td><td><pre> <span class="token keyword">let</span> frontIndex <span class="token operator">=</span> i <span class="token operator">-</span> compareKlineSize</pre></td></tr><tr><td data-num="19"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>frontIndex <span class="token operator"><=</span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="20"></td><td><pre> frontIndex <span class="token operator">=</span> <span class="token number">0</span></pre></td></tr><tr><td data-num="21"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="22"></td><td><pre> <span class="token keyword">let</span> frontDatas <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span></pre></td></tr><tr><td data-num="23"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>frontIndex <span class="token operator"><</span> i<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="24"></td><td><pre> frontDatas <span class="token operator">=</span> dataList<span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span>frontIndex<span class="token punctuation">,</span> i<span class="token punctuation">)</span></pre></td></tr><tr><td data-num="25"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="26"></td><td><pre> <span class="token keyword">let</span> afterIndex <span class="token operator">=</span> i <span class="token operator">+</span> compareKlineSize <span class="token operator">+</span> <span class="token number">1</span></pre></td></tr><tr><td data-num="27"></td><td><pre> <span class="token keyword">let</span> afterDatas <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span></pre></td></tr><tr><td data-num="28"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>i <span class="token operator"><</span> dataList<span class="token punctuation">.</span>length <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="29"></td><td><pre> afterDatas <span class="token operator">=</span> dataList<span class="token punctuation">.</span><span class="token function">slice</span><span class="token punctuation">(</span>i <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">,</span> afterIndex<span class="token punctuation">)</span></pre></td></tr><tr><td data-num="30"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="31"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>frontDatas<span class="token punctuation">.</span>length <span class="token operator">===</span> compareKlineSize <span class="token operator">&&</span> afterDatas<span class="token punctuation">.</span>length <span class="token operator">===</span> compareKlineSize<span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token comment">// 前后 K 线数据必须都找到要比较的条数</span></pre></td></tr><tr><td data-num="32"></td><td><pre> <span class="token keyword">let</span> high <span class="token operator">=</span> <span class="token keyword">null</span></pre></td></tr><tr><td data-num="33"></td><td><pre> <span class="token keyword">let</span> low <span class="token operator">=</span> <span class="token keyword">null</span></pre></td></tr><tr><td data-num="34"></td><td><pre> frontDatas<span class="token punctuation">.</span><span class="token function">concat</span><span class="token punctuation">(</span>afterDatas<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">forEach</span><span class="token punctuation">(</span><span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token parameter">kLineData<span class="token punctuation">,</span> i</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token comment">// 找出前后 k 线中的最高和最低价</span></pre></td></tr><tr><td data-num="35"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>high <span class="token operator">===</span> <span class="token keyword">null</span> <span class="token operator">||</span> kLineData<span class="token punctuation">.</span>high <span class="token operator">></span> high<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="36"></td><td><pre> high <span class="token operator">=</span> kLineData<span class="token punctuation">.</span>high</pre></td></tr><tr><td data-num="37"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="38"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>low <span class="token operator">===</span> <span class="token keyword">null</span> <span class="token operator">||</span> kLineData<span class="token punctuation">.</span>low <span class="token operator"><</span> low<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="39"></td><td><pre> low <span class="token operator">=</span> kLineData<span class="token punctuation">.</span>low</pre></td></tr><tr><td data-num="40"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="41"></td><td><pre> <span class="token punctuation">}</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="42"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>kLineData<span class="token punctuation">.</span>high <span class="token operator">></span> high<span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token comment">// 当前 k 的高大于前后 k 中找出的高，则放入高价集合中</span></pre></td></tr><tr><td data-num="43"></td><td><pre> highs<span class="token punctuation">.</span><span class="token function">push</span><span class="token punctuation">(</span><span class="token punctuation">{</span></pre></td></tr><tr><td data-num="44"></td><td><pre> <span class="token literal-property property">time</span><span class="token operator">:</span> kLineData<span class="token punctuation">.</span>timestamp<span class="token punctuation">,</span></pre></td></tr><tr><td data-num="45"></td><td><pre> <span class="token literal-property property">value</span><span class="token operator">:</span> kLineData<span class="token punctuation">.</span>high<span class="token punctuation">,</span></pre></td></tr><tr><td data-num="46"></td><td><pre> <span class="token literal-property property">index</span><span class="token operator">:</span> i</pre></td></tr><tr><td data-num="47"></td><td><pre> <span class="token punctuation">}</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="48"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isNotEmpty</span><span class="token punctuation">(</span>findHigh<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="49"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>findHigh <span class="token operator">&&</span> highLows<span class="token punctuation">[</span>highLows<span class="token punctuation">.</span>length <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">.</span>value <span class="token operator">!==</span> kLineData<span class="token punctuation">.</span>high<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="50"></td><td><pre> highLows<span class="token punctuation">.</span><span class="token function">push</span><span class="token punctuation">(</span><span class="token punctuation">{</span></pre></td></tr><tr><td data-num="51"></td><td><pre> <span class="token literal-property property">time</span><span class="token operator">:</span> kLineData<span class="token punctuation">.</span>timestamp<span class="token punctuation">,</span></pre></td></tr><tr><td data-num="52"></td><td><pre> <span class="token literal-property property">value</span><span class="token operator">:</span> kLineData<span class="token punctuation">.</span>high<span class="token punctuation">,</span></pre></td></tr><tr><td data-num="53"></td><td><pre> <span class="token literal-property property">index</span><span class="token operator">:</span> i</pre></td></tr><tr><td data-num="54"></td><td><pre> <span class="token punctuation">}</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="55"></td><td><pre> findHigh <span class="token operator">=</span> <span class="token boolean">false</span></pre></td></tr><tr><td data-num="56"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="57"></td><td><pre> <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="58"></td><td><pre> highLows<span class="token punctuation">.</span><span class="token function">push</span><span class="token punctuation">(</span><span class="token punctuation">{</span></pre></td></tr><tr><td data-num="59"></td><td><pre> <span class="token literal-property property">time</span><span class="token operator">:</span> kLineData<span class="token punctuation">.</span>timestamp<span class="token punctuation">,</span></pre></td></tr><tr><td data-num="60"></td><td><pre> <span class="token literal-property property">value</span><span class="token operator">:</span> kLineData<span class="token punctuation">.</span>high<span class="token punctuation">,</span></pre></td></tr><tr><td data-num="61"></td><td><pre> <span class="token literal-property property">index</span><span class="token operator">:</span> i</pre></td></tr><tr><td data-num="62"></td><td><pre> <span class="token punctuation">}</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="63"></td><td><pre> findHigh <span class="token operator">=</span> <span class="token boolean">false</span></pre></td></tr><tr><td data-num="64"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="65"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="66"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>kLineData<span class="token punctuation">.</span>low <span class="token operator"><</span> low<span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token comment">// 当前 k 的低小于前后 k 中找出的低，则放入低价集合中</span></pre></td></tr><tr><td data-num="67"></td><td><pre> lows<span class="token punctuation">.</span><span class="token function">push</span><span class="token punctuation">(</span><span class="token punctuation">{</span></pre></td></tr><tr><td data-num="68"></td><td><pre> <span class="token literal-property property">time</span><span class="token operator">:</span> kLineData<span class="token punctuation">.</span>timestamp<span class="token punctuation">,</span></pre></td></tr><tr><td data-num="69"></td><td><pre> <span class="token literal-property property">value</span><span class="token operator">:</span> kLineData<span class="token punctuation">.</span>low<span class="token punctuation">,</span></pre></td></tr><tr><td data-num="70"></td><td><pre> <span class="token literal-property property">index</span><span class="token operator">:</span> i</pre></td></tr><tr><td data-num="71"></td><td><pre> <span class="token punctuation">}</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="72"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isNotEmpty</span><span class="token punctuation">(</span>findHigh<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="73"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token operator">!</span>findHigh <span class="token operator">&&</span> highLows<span class="token punctuation">[</span>highLows<span class="token punctuation">.</span>length <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">.</span>value <span class="token operator">!==</span> kLineData<span class="token punctuation">.</span>low<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="74"></td><td><pre> highLows<span class="token punctuation">.</span><span class="token function">push</span><span class="token punctuation">(</span><span class="token punctuation">{</span></pre></td></tr><tr><td data-num="75"></td><td><pre> <span class="token literal-property property">time</span><span class="token operator">:</span> kLineData<span class="token punctuation">.</span>timestamp<span class="token punctuation">,</span></pre></td></tr><tr><td data-num="76"></td><td><pre> <span class="token literal-property property">value</span><span class="token operator">:</span> kLineData<span class="token punctuation">.</span>low<span class="token punctuation">,</span></pre></td></tr><tr><td data-num="77"></td><td><pre> <span class="token literal-property property">index</span><span class="token operator">:</span> i</pre></td></tr><tr><td data-num="78"></td><td><pre> <span class="token punctuation">}</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="79"></td><td><pre> findHigh <span class="token operator">=</span> <span class="token boolean">true</span></pre></td></tr><tr><td data-num="80"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="81"></td><td><pre> <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="82"></td><td><pre> highLows<span class="token punctuation">.</span><span class="token function">push</span><span class="token punctuation">(</span><span class="token punctuation">{</span></pre></td></tr><tr><td data-num="83"></td><td><pre> <span class="token literal-property property">time</span><span class="token operator">:</span> kLineData<span class="token punctuation">.</span>timestamp<span class="token punctuation">,</span></pre></td></tr><tr><td data-num="84"></td><td><pre> <span class="token literal-property property">value</span><span class="token operator">:</span> kLineData<span class="token punctuation">.</span>low<span class="token punctuation">,</span></pre></td></tr><tr><td data-num="85"></td><td><pre> <span class="token literal-property property">index</span><span class="token operator">:</span> i</pre></td></tr><tr><td data-num="86"></td><td><pre> <span class="token punctuation">}</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="87"></td><td><pre> findHigh <span class="token operator">=</span> <span class="token boolean">true</span></pre></td></tr><tr><td data-num="88"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="89"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="90"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="91"></td><td><pre> <span class="token punctuation">}</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="92"></td><td><pre> <span class="token keyword">let</span> high<span class="token punctuation">,</span> low<span class="token punctuation">,</span> highLow</pre></td></tr><tr><td data-num="93"></td><td><pre> <span class="token keyword">return</span> dataList<span class="token punctuation">.</span><span class="token function">map</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token parameter">kLineData<span class="token punctuation">,</span> i</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="94"></td><td><pre> <span class="token keyword">let</span> item <span class="token operator">=</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="95"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="96"></td><td><pre> highs<span class="token punctuation">.</span><span class="token function">forEach</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token parameter">data</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="97"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>kLineData<span class="token punctuation">.</span>timestamp <span class="token operator">===</span> data<span class="token punctuation">.</span>time<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="98"></td><td><pre> high <span class="token operator">=</span> data<span class="token punctuation">.</span>value</pre></td></tr><tr><td data-num="99"></td><td><pre> item<span class="token punctuation">.</span>highOrigin <span class="token operator">=</span> <span class="token boolean">true</span></pre></td></tr><tr><td data-num="100"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="101"></td><td><pre> <span class="token punctuation">}</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="102"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isNotEmpty</span><span class="token punctuation">(</span>high<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token comment">// 持续先前的高，画出阶梯线</span></pre></td></tr><tr><td data-num="103"></td><td><pre> item<span class="token punctuation">.</span>timestamp <span class="token operator">=</span> kLineData<span class="token punctuation">.</span>timestamp</pre></td></tr><tr><td data-num="104"></td><td><pre> item<span class="token punctuation">.</span>high <span class="token operator">=</span> high</pre></td></tr><tr><td data-num="105"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="106"></td><td><pre> lows<span class="token punctuation">.</span><span class="token function">forEach</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token parameter">data</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="107"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>kLineData<span class="token punctuation">.</span>timestamp <span class="token operator">===</span> data<span class="token punctuation">.</span>time<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="108"></td><td><pre> low <span class="token operator">=</span> data<span class="token punctuation">.</span>value</pre></td></tr><tr><td data-num="109"></td><td><pre> item<span class="token punctuation">.</span>lowOrigin <span class="token operator">=</span> <span class="token boolean">true</span></pre></td></tr><tr><td data-num="110"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="111"></td><td><pre> <span class="token punctuation">}</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="112"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isNotEmpty</span><span class="token punctuation">(</span>low<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token comment">// 持续先前的低，画出阶梯线</span></pre></td></tr><tr><td data-num="113"></td><td><pre> item<span class="token punctuation">.</span>timestamp <span class="token operator">=</span> kLineData<span class="token punctuation">.</span>timestamp</pre></td></tr><tr><td data-num="114"></td><td><pre> item<span class="token punctuation">.</span>low <span class="token operator">=</span> low</pre></td></tr><tr><td data-num="115"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="116"></td><td><pre> highLows<span class="token punctuation">.</span><span class="token function">forEach</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token parameter">data</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="117"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>kLineData<span class="token punctuation">.</span>timestamp <span class="token operator">===</span> data<span class="token punctuation">.</span>time<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="118"></td><td><pre> highLow <span class="token operator">=</span> data<span class="token punctuation">.</span>value</pre></td></tr><tr><td data-num="119"></td><td><pre> item<span class="token punctuation">.</span>highLowOrigin <span class="token operator">=</span> <span class="token boolean">true</span></pre></td></tr><tr><td data-num="120"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="121"></td><td><pre> <span class="token punctuation">}</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="122"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isNotEmpty</span><span class="token punctuation">(</span>highLow<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token comment">// 持续先前的高低，方便 title 显示</span></pre></td></tr><tr><td data-num="123"></td><td><pre> item<span class="token punctuation">.</span>timestamp <span class="token operator">=</span> kLineData<span class="token punctuation">.</span>timestamp</pre></td></tr><tr><td data-num="124"></td><td><pre> item<span class="token punctuation">.</span>highLow <span class="token operator">=</span> highLow</pre></td></tr><tr><td data-num="125"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="126"></td><td><pre> <span class="token keyword">return</span> item</pre></td></tr><tr><td data-num="127"></td><td><pre> <span class="token punctuation">}</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="128"></td><td><pre> <span class="token punctuation">}</span><span class="token punctuation">,</span></pre></td></tr><tr><td data-num="129"></td><td><pre> <span class="token function-variable function">render</span><span class="token operator">:</span> <span class="token punctuation">(</span><span class="token parameter"><span class="token punctuation">{</span> ctx<span class="token punctuation">,</span> dataSource<span class="token punctuation">,</span> viewport<span class="token punctuation">,</span> styles<span class="token punctuation">,</span> xAxis<span class="token punctuation">,</span> yAxis <span class="token punctuation">}</span></span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="130"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>dataSource<span class="token punctuation">.</span>technicalIndicatorDataList<span class="token punctuation">.</span>length <span class="token operator"><=</span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="131"></td><td><pre> <span class="token keyword">return</span></pre></td></tr><tr><td data-num="132"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="133"></td><td><pre> <span class="token keyword">let</span> x <span class="token operator">=</span> xAxis<span class="token punctuation">.</span><span class="token function">convertToPixel</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="134"></td><td><pre> <span class="token keyword">let</span> high<span class="token punctuation">,</span> low<span class="token punctuation">,</span> highLow<span class="token punctuation">,</span> highLowX</pre></td></tr><tr><td data-num="135"></td><td><pre> dataSource<span class="token punctuation">.</span>technicalIndicatorDataList<span class="token punctuation">.</span><span class="token function">forEach</span><span class="token punctuation">(</span><span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token parameter">data<span class="token punctuation">,</span> i</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="136"></td><td><pre> <span class="token comment">// 画高线</span></pre></td></tr><tr><td data-num="137"></td><td><pre> ctx<span class="token punctuation">.</span>textBaseline <span class="token operator">=</span> <span class="token string">'middle'</span></pre></td></tr><tr><td data-num="138"></td><td><pre> ctx<span class="token punctuation">.</span>textAlign <span class="token operator">=</span> <span class="token string">'center'</span></pre></td></tr><tr><td data-num="139"></td><td><pre> ctx<span class="token punctuation">.</span>fillStyle <span class="token operator">=</span> <span class="token string">'#fff'</span></pre></td></tr><tr><td data-num="140"></td><td><pre> ctx<span class="token punctuation">.</span>strokeStyle <span class="token operator">=</span> <span class="token string">'#fff'</span></pre></td></tr><tr><td data-num="141"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>styles<span class="token punctuation">.</span>line <span class="token operator">&&</span> styles<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors <span class="token operator">&&</span> styles<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors<span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="142"></td><td><pre> ctx<span class="token punctuation">.</span>fillStyle <span class="token operator">=</span> styles<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors<span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span></pre></td></tr><tr><td data-num="143"></td><td><pre> ctx<span class="token punctuation">.</span>strokeStyle <span class="token operator">=</span> styles<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors<span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span></pre></td></tr><tr><td data-num="144"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="145"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isNotEmpty</span><span class="token punctuation">(</span>high<span class="token punctuation">)</span> <span class="token operator">&&</span> data<span class="token punctuation">.</span>high <span class="token operator">!==</span> high<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="146"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">beginPath</span><span class="token punctuation">(</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="147"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">moveTo</span><span class="token punctuation">(</span>x<span class="token punctuation">,</span> yAxis<span class="token punctuation">.</span><span class="token function">convertToPixel</span><span class="token punctuation">(</span>high<span class="token punctuation">)</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="148"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">lineTo</span><span class="token punctuation">(</span>x<span class="token punctuation">,</span> yAxis<span class="token punctuation">.</span><span class="token function">convertToPixel</span><span class="token punctuation">(</span>data<span class="token punctuation">.</span>high<span class="token punctuation">)</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="149"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">stroke</span><span class="token punctuation">(</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="150"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">closePath</span><span class="token punctuation">(</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="151"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="152"></td><td><pre> high <span class="token operator">=</span> data<span class="token punctuation">.</span>high</pre></td></tr><tr><td data-num="153"></td><td><pre> <span class="token keyword">let</span> y <span class="token operator">=</span> yAxis<span class="token punctuation">.</span><span class="token function">convertToPixel</span><span class="token punctuation">(</span>high<span class="token punctuation">)</span></pre></td></tr><tr><td data-num="154"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">beginPath</span><span class="token punctuation">(</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="155"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">moveTo</span><span class="token punctuation">(</span>x<span class="token punctuation">,</span> y<span class="token punctuation">)</span></pre></td></tr><tr><td data-num="156"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">lineTo</span><span class="token punctuation">(</span>x <span class="token operator">+</span> viewport<span class="token punctuation">.</span>dataSpace<span class="token punctuation">,</span> y<span class="token punctuation">)</span></pre></td></tr><tr><td data-num="157"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">stroke</span><span class="token punctuation">(</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="158"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">closePath</span><span class="token punctuation">(</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="159"></td><td><pre> <span class="token comment">// 画低线</span></pre></td></tr><tr><td data-num="160"></td><td><pre> ctx<span class="token punctuation">.</span>fillStyle <span class="token operator">=</span> <span class="token string">'#fff'</span></pre></td></tr><tr><td data-num="161"></td><td><pre> ctx<span class="token punctuation">.</span>strokeStyle <span class="token operator">=</span> <span class="token string">'#fff'</span></pre></td></tr><tr><td data-num="162"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>styles<span class="token punctuation">.</span>line <span class="token operator">&&</span> styles<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors <span class="token operator">&&</span> styles<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="163"></td><td><pre> ctx<span class="token punctuation">.</span>fillStyle <span class="token operator">=</span> styles<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span></pre></td></tr><tr><td data-num="164"></td><td><pre> ctx<span class="token punctuation">.</span>strokeStyle <span class="token operator">=</span> styles<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span></pre></td></tr><tr><td data-num="165"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="166"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isNotEmpty</span><span class="token punctuation">(</span>low<span class="token punctuation">)</span> <span class="token operator">&&</span> data<span class="token punctuation">.</span>low <span class="token operator">!==</span> low<span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="167"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">beginPath</span><span class="token punctuation">(</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="168"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">moveTo</span><span class="token punctuation">(</span>x<span class="token punctuation">,</span> yAxis<span class="token punctuation">.</span><span class="token function">convertToPixel</span><span class="token punctuation">(</span>low<span class="token punctuation">)</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="169"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">lineTo</span><span class="token punctuation">(</span>x<span class="token punctuation">,</span> yAxis<span class="token punctuation">.</span><span class="token function">convertToPixel</span><span class="token punctuation">(</span>data<span class="token punctuation">.</span>low<span class="token punctuation">)</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="170"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">stroke</span><span class="token punctuation">(</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="171"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">closePath</span><span class="token punctuation">(</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="172"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="173"></td><td><pre> low <span class="token operator">=</span> data<span class="token punctuation">.</span>low</pre></td></tr><tr><td data-num="174"></td><td><pre> y <span class="token operator">=</span> yAxis<span class="token punctuation">.</span><span class="token function">convertToPixel</span><span class="token punctuation">(</span>low<span class="token punctuation">)</span></pre></td></tr><tr><td data-num="175"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">beginPath</span><span class="token punctuation">(</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="176"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">moveTo</span><span class="token punctuation">(</span>x<span class="token punctuation">,</span> y<span class="token punctuation">)</span></pre></td></tr><tr><td data-num="177"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">lineTo</span><span class="token punctuation">(</span>x <span class="token operator">+</span> viewport<span class="token punctuation">.</span>dataSpace<span class="token punctuation">,</span> y<span class="token punctuation">)</span></pre></td></tr><tr><td data-num="178"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">stroke</span><span class="token punctuation">(</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="179"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">closePath</span><span class="token punctuation">(</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="180"></td><td><pre> <span class="token comment">// 画高低线</span></pre></td></tr><tr><td data-num="181"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isNotEmpty</span><span class="token punctuation">(</span>data<span class="token punctuation">.</span>highLow<span class="token punctuation">)</span> <span class="token operator">&&</span> data<span class="token punctuation">.</span>highLowOrigin <span class="token operator">===</span> <span class="token boolean">true</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="182"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">isNotEmpty</span><span class="token punctuation">(</span>highLow<span class="token punctuation">)</span> <span class="token operator">&&</span> <span class="token function">isNotEmpty</span><span class="token punctuation">(</span>highLowX<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="183"></td><td><pre> ctx<span class="token punctuation">.</span>fillStyle <span class="token operator">=</span> <span class="token string">'#fff'</span></pre></td></tr><tr><td data-num="184"></td><td><pre> ctx<span class="token punctuation">.</span>strokeStyle <span class="token operator">=</span> <span class="token string">'#fff'</span></pre></td></tr><tr><td data-num="185"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>styles<span class="token punctuation">.</span>line <span class="token operator">&&</span> styles<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors <span class="token operator">&&</span> styles<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="186"></td><td><pre> ctx<span class="token punctuation">.</span>fillStyle <span class="token operator">=</span> styles<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span></pre></td></tr><tr><td data-num="187"></td><td><pre> ctx<span class="token punctuation">.</span>strokeStyle <span class="token operator">=</span> styles<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span></pre></td></tr><tr><td data-num="188"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="189"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">beginPath</span><span class="token punctuation">(</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="190"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">moveTo</span><span class="token punctuation">(</span>highLowX<span class="token punctuation">,</span> yAxis<span class="token punctuation">.</span><span class="token function">convertToPixel</span><span class="token punctuation">(</span>highLow<span class="token punctuation">)</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="191"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">lineTo</span><span class="token punctuation">(</span>x<span class="token punctuation">,</span> yAxis<span class="token punctuation">.</span><span class="token function">convertToPixel</span><span class="token punctuation">(</span>data<span class="token punctuation">.</span>highLow<span class="token punctuation">)</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="192"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">stroke</span><span class="token punctuation">(</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="193"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">closePath</span><span class="token punctuation">(</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="194"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="195"></td><td><pre> highLow <span class="token operator">=</span> data<span class="token punctuation">.</span>highLow</pre></td></tr><tr><td data-num="196"></td><td><pre> highLowX <span class="token operator">=</span> x</pre></td></tr><tr><td data-num="197"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="198"></td><td><pre> <span class="token comment">// 画价格</span></pre></td></tr><tr><td data-num="199"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>data<span class="token punctuation">.</span>high <span class="token operator">!==</span> <span class="token keyword">undefined</span> <span class="token operator">&&</span> data<span class="token punctuation">.</span>highOrigin <span class="token operator">===</span> <span class="token boolean">true</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token comment">// 画高价</span></pre></td></tr><tr><td data-num="200"></td><td><pre> <span class="token keyword">let</span> text <span class="token operator">=</span> Number<span class="token punctuation">.</span><span class="token function">parseFloat</span><span class="token punctuation">(</span>data<span class="token punctuation">.</span>high<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">toFixed</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="201"></td><td><pre> ctx<span class="token punctuation">.</span>fillStyle <span class="token operator">=</span> <span class="token string">'#fff'</span></pre></td></tr><tr><td data-num="202"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>styles<span class="token punctuation">.</span>line <span class="token operator">&&</span> styles<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors <span class="token operator">&&</span> styles<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors<span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="203"></td><td><pre> ctx<span class="token punctuation">.</span>fillStyle <span class="token operator">=</span> styles<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors<span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span></pre></td></tr><tr><td data-num="204"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="205"></td><td><pre> <span class="token keyword">let</span> offset <span class="token operator">=</span> <span class="token number">10</span></pre></td></tr><tr><td data-num="206"></td><td><pre> <span class="token keyword">let</span> y <span class="token operator">=</span> yAxis<span class="token punctuation">.</span><span class="token function">convertToPixel</span><span class="token punctuation">(</span>data<span class="token punctuation">.</span>high<span class="token punctuation">)</span></pre></td></tr><tr><td data-num="207"></td><td><pre> <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">let</span> i <span class="token operator">=</span> <span class="token number">2</span><span class="token punctuation">;</span> i <span class="token operator"><</span> offset <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">;</span> i <span class="token operator">+=</span> <span class="token number">2</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="208"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">fillText</span><span class="token punctuation">(</span><span class="token string">'.'</span><span class="token punctuation">,</span> x<span class="token punctuation">,</span> y <span class="token operator">-</span> i<span class="token punctuation">)</span></pre></td></tr><tr><td data-num="209"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="210"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">fillText</span><span class="token punctuation">(</span>text<span class="token punctuation">,</span> x<span class="token punctuation">,</span> y <span class="token operator">-</span> offset<span class="token punctuation">)</span></pre></td></tr><tr><td data-num="211"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="212"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>data<span class="token punctuation">.</span>low <span class="token operator">!==</span> <span class="token keyword">undefined</span> <span class="token operator">&&</span> data<span class="token punctuation">.</span>lowOrigin <span class="token operator">===</span> <span class="token boolean">true</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token comment">// 画低价</span></pre></td></tr><tr><td data-num="213"></td><td><pre> <span class="token keyword">let</span> text <span class="token operator">=</span> Number<span class="token punctuation">.</span><span class="token function">parseFloat</span><span class="token punctuation">(</span>data<span class="token punctuation">.</span>low<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">toFixed</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="214"></td><td><pre> ctx<span class="token punctuation">.</span>fillStyle <span class="token operator">=</span> <span class="token string">'#fff'</span></pre></td></tr><tr><td data-num="215"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>styles<span class="token punctuation">.</span>line <span class="token operator">&&</span> styles<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors <span class="token operator">&&</span> styles<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="216"></td><td><pre> ctx<span class="token punctuation">.</span>fillStyle <span class="token operator">=</span> styles<span class="token punctuation">.</span>line<span class="token punctuation">.</span>colors<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span></pre></td></tr><tr><td data-num="217"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="218"></td><td><pre> <span class="token keyword">let</span> offset <span class="token operator">=</span> <span class="token number">15</span></pre></td></tr><tr><td data-num="219"></td><td><pre> <span class="token keyword">let</span> y <span class="token operator">=</span> yAxis<span class="token punctuation">.</span><span class="token function">convertToPixel</span><span class="token punctuation">(</span>data<span class="token punctuation">.</span>low<span class="token punctuation">)</span></pre></td></tr><tr><td data-num="220"></td><td><pre> <span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">let</span> i <span class="token operator">=</span> <span class="token number">2</span><span class="token punctuation">;</span> i <span class="token operator"><</span> offset <span class="token operator">-</span> <span class="token number">5</span><span class="token punctuation">;</span> i <span class="token operator">+=</span> <span class="token number">2</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="221"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">fillText</span><span class="token punctuation">(</span><span class="token string">'.'</span><span class="token punctuation">,</span> x<span class="token punctuation">,</span> y <span class="token operator">+</span> i<span class="token punctuation">)</span></pre></td></tr><tr><td data-num="222"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="223"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">fillText</span><span class="token punctuation">(</span>text<span class="token punctuation">,</span> x<span class="token punctuation">,</span> y <span class="token operator">+</span> offset<span class="token punctuation">)</span></pre></td></tr><tr><td data-num="224"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="225"></td><td><pre> x <span class="token operator">+=</span> viewport<span class="token punctuation">.</span>dataSpace</pre></td></tr><tr><td data-num="226"></td><td><pre> <span class="token punctuation">}</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="227"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="228"></td><td><pre><span class="token punctuation">}</span><span class="token punctuation">)</span></pre></td></tr></table></figure><div class="tags"><a href="/tags/KLineChart/" rel="tag"><i class="ic i-tag"></i> KLineChart</a> <a href="/tags/K%E7%BA%BF/" rel="tag"><i class="ic i-tag"></i> K线</a> <a href="/tags/%E8%87%AA%E5%AE%9A%E4%B9%89%E6%8C%87%E6%A0%87/" rel="tag"><i class="ic i-tag"></i> 自定义指标</a></div></div><footer><div class="meta"><span class="item"><span class="icon"><i class="ic i-calendar-check"></i> </span><span class="text">更新于</span> <time title="修改时间：2023-04-22 21:41:26" itemprop="dateModified" datetime="2023-04-22T21:41:26+08:00">2023-04-22</time> </span><span id="2023/01/31/KLineChart画波段高低价图/" class="item leancloud_visitors" data-flag-title="KLineChart 画波段高低价图" title="阅读次数"><span class="icon"><i class="ic i-eye"></i> </span><span class="text">阅读次数</span> <span class="leancloud-visitors-count"></span> <span class="text">次</span></span></div><div class="reward"><button><i class="ic i-heartbeat"></i> 赞赏</button><p>请我喝[茶]~(￣▽￣)~*</p><div id="qr"><div><img data-src="/images/wechatpay.png" alt="Hito Li 微信支付"><p>微信支付</p></div><div><img data-src="/images/alipay.png" alt="Hito Li 支付宝"><p>支付宝</p></div></div></div><div id="copyright"><ul><li class="author"><strong>本文作者： </strong>Hito Li <i class="ic i-at"><em>@</em></i>涛声依旧</li><li 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