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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><p></p><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span 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class="line">223</span><br><span class="line">224</span><br><span class="line">225</span><br><span class="line">226</span><br><span class="line">227</span><br><span class="line">228</span><br></pre></td><td class="code"><pre><span class="line"><span class="variable language_">this</span>.<span class="property">chart</span>.<span class="title function_">addTechnicalIndicatorTemplate</span>({</span><br><span class="line"> <span class="attr">name</span>: <span class="string">'BandHighLowInd'</span>,</span><br><span class="line"> <span class="attr">shortName</span>: <span class="string">'波段高低价'</span>,</span><br><span class="line"> <span class="attr">calcParams</span>: [{ <span class="attr">value</span>: <span class="number">10</span> }],</span><br><span class="line"> <span class="attr">precision</span>: <span class="number">2</span>,</span><br><span class="line"> <span class="attr">plots</span>: [</span><br><span class="line"> { <span class="attr">key</span>: <span class="string">'high'</span>, <span class="attr">title</span>: <span class="string">'高: '</span>, <span class="attr">color</span>: <span class="function">(<span class="params">data, options</span>) =></span> { <span class="keyword">return</span> options.<span class="property">line</span>.<span class="property">colors</span>[<span class="number">0</span>] } },</span><br><span class="line"> { <span class="attr">key</span>: <span class="string">'low'</span>, <span class="attr">title</span>: <span class="string">'低: '</span>, <span class="attr">color</span>: <span class="function">(<span class="params">data, options</span>) =></span> { <span class="keyword">return</span> options.<span class="property">line</span>.<span class="property">colors</span>[<span class="number">1</span>] } },</span><br><span class="line"> { <span class="attr">key</span>: <span class="string">'highLow'</span>, <span class="attr">title</span>: <span class="string">'高低: '</span>, <span class="attr">color</span>: <span class="function">(<span class="params">data, options</span>) =></span> { <span class="keyword">return</span> options.<span class="property">line</span>.<span class="property">colors</span>[<span class="number">2</span>] } }</span><br><span class="line"> ],</span><br><span class="line"> <span class="attr">calcTechnicalIndicator</span>: <span class="function">(<span class="params">dataList, { params }</span>) =></span> {</span><br><span class="line"> <span class="keyword">let</span> compareKlineSize = params[<span class="number">0</span>] <span class="comment">//取前后k的范围</span></span><br><span class="line"> <span class="keyword">let</span> highs = []</span><br><span class="line"> <span class="keyword">let</span> lows = []</span><br><span class="line"> <span class="keyword">let</span> highLows = []</span><br><span class="line"> <span class="keyword">let</span> findHigh <span class="comment">//高低价当前查找标识</span></span><br><span class="line"> dataList.<span class="title function_">forEach</span>(<span class="keyword">function</span> (<span class="params">kLineData, i</span>) {</span><br><span class="line"> <span class="keyword">let</span> frontIndex = i - compareKlineSize</span><br><span class="line"> <span class="keyword">if</span> (frontIndex <= <span class="number">0</span>) {</span><br><span class="line"> frontIndex = <span class="number">0</span></span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">let</span> frontDatas = []</span><br><span class="line"> <span class="keyword">if</span> (frontIndex < i) {</span><br><span class="line"> frontDatas = dataList.<span class="title function_">slice</span>(frontIndex, i)</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">let</span> afterIndex = i + compareKlineSize + <span class="number">1</span></span><br><span class="line"> <span class="keyword">let</span> afterDatas = []</span><br><span class="line"> <span class="keyword">if</span> (i < dataList.<span class="property">length</span> - <span class="number">1</span>) {</span><br><span class="line"> afterDatas = dataList.<span class="title function_">slice</span>(i + <span class="number">1</span>, afterIndex)</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">if</span> (frontDatas.<span class="property">length</span> === compareKlineSize && afterDatas.<span class="property">length</span> === compareKlineSize) { <span class="comment">// 前后K线数据必须都找到要比较的条数</span></span><br><span class="line"> <span class="keyword">let</span> high = <span class="literal">null</span></span><br><span class="line"> <span class="keyword">let</span> low = <span class="literal">null</span></span><br><span class="line"> frontDatas.<span class="title function_">concat</span>(afterDatas).<span class="title function_">forEach</span>(<span class="keyword">function</span> (<span class="params">kLineData, i</span>) { <span class="comment">// 找出前后k线中的最高和最低价</span></span><br><span class="line"> <span class="keyword">if</span> (high === <span class="literal">null</span> || kLineData.<span class="property">high</span> > high) {</span><br><span class="line"> high = kLineData.<span class="property">high</span></span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">if</span> (low === <span class="literal">null</span> || kLineData.<span class="property">low</span> < low) {</span><br><span class="line"> low = kLineData.<span class="property">low</span></span><br><span class="line"> }</span><br><span class="line"> })</span><br><span class="line"> <span class="keyword">if</span> (kLineData.<span class="property">high</span> > high) { <span class="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></span><br><span class="line"> highs.<span class="title function_">push</span>({</span><br><span class="line"> <span class="attr">time</span>: kLineData.<span class="property">timestamp</span>,</span><br><span class="line"> <span class="attr">value</span>: kLineData.<span class="property">high</span>,</span><br><span class="line"> <span class="attr">index</span>: i</span><br><span class="line"> })</span><br><span class="line"> <span class="keyword">if</span> (<span class="title function_">isNotEmpty</span>(findHigh)) {</span><br><span class="line"> <span class="keyword">if</span> (findHigh && highLows[highLows.<span class="property">length</span> - <span class="number">1</span>].<span class="property">value</span> !== kLineData.<span class="property">high</span>) {</span><br><span class="line"> highLows.<span class="title function_">push</span>({</span><br><span class="line"> <span class="attr">time</span>: kLineData.<span class="property">timestamp</span>,</span><br><span class="line"> <span class="attr">value</span>: kLineData.<span class="property">high</span>,</span><br><span class="line"> <span class="attr">index</span>: i</span><br><span class="line"> })</span><br><span class="line"> findHigh = <span class="literal">false</span></span><br><span class="line"> }</span><br><span class="line"> } <span class="keyword">else</span> {</span><br><span class="line"> highLows.<span class="title function_">push</span>({</span><br><span class="line"> <span class="attr">time</span>: kLineData.<span class="property">timestamp</span>,</span><br><span class="line"> <span class="attr">value</span>: kLineData.<span class="property">high</span>,</span><br><span class="line"> <span class="attr">index</span>: i</span><br><span class="line"> })</span><br><span class="line"> findHigh = <span class="literal">false</span></span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">if</span> (kLineData.<span class="property">low</span> < low) { <span class="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></span><br><span class="line"> lows.<span class="title function_">push</span>({</span><br><span class="line"> <span class="attr">time</span>: kLineData.<span class="property">timestamp</span>,</span><br><span class="line"> <span class="attr">value</span>: kLineData.<span class="property">low</span>,</span><br><span class="line"> <span class="attr">index</span>: i</span><br><span class="line"> })</span><br><span class="line"> <span class="keyword">if</span> (<span class="title function_">isNotEmpty</span>(findHigh)) {</span><br><span class="line"> <span class="keyword">if</span> (!findHigh && highLows[highLows.<span class="property">length</span> - <span class="number">1</span>].<span class="property">value</span> !== kLineData.<span class="property">low</span>) {</span><br><span class="line"> highLows.<span class="title function_">push</span>({</span><br><span class="line"> <span class="attr">time</span>: kLineData.<span class="property">timestamp</span>,</span><br><span class="line"> <span class="attr">value</span>: kLineData.<span class="property">low</span>,</span><br><span class="line"> <span class="attr">index</span>: i</span><br><span class="line"> })</span><br><span class="line"> findHigh = <span class="literal">true</span></span><br><span class="line"> }</span><br><span class="line"> } <span class="keyword">else</span> {</span><br><span class="line"> highLows.<span class="title function_">push</span>({</span><br><span class="line"> <span class="attr">time</span>: kLineData.<span class="property">timestamp</span>,</span><br><span class="line"> <span class="attr">value</span>: kLineData.<span class="property">low</span>,</span><br><span class="line"> <span class="attr">index</span>: i</span><br><span class="line"> })</span><br><span class="line"> findHigh = <span class="literal">true</span></span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> })</span><br><span class="line"> <span class="keyword">let</span> high, low, highLow</span><br><span class="line"> <span class="keyword">return</span> dataList.<span class="title function_">map</span>(<span class="function">(<span class="params">kLineData, i</span>) =></span> {</span><br><span class="line"> <span class="keyword">let</span> item = {</span><br><span class="line"> }</span><br><span class="line"> highs.<span class="title function_">forEach</span>(<span class="function">(<span class="params">data</span>) =></span> {</span><br><span class="line"> <span class="keyword">if</span> (kLineData.<span class="property">timestamp</span> === data.<span class="property">time</span>) {</span><br><span class="line"> high = data.<span class="property">value</span></span><br><span class="line"> item.<span class="property">highOrigin</span> = <span class="literal">true</span></span><br><span class="line"> }</span><br><span class="line"> })</span><br><span class="line"> <span class="keyword">if</span> (<span class="title function_">isNotEmpty</span>(high)) { <span class="comment">// 持续先前的高，画出阶梯线</span></span><br><span class="line"> item.<span class="property">timestamp</span> = kLineData.<span class="property">timestamp</span></span><br><span class="line"> item.<span class="property">high</span> = high</span><br><span class="line"> }</span><br><span class="line"> lows.<span class="title function_">forEach</span>(<span class="function">(<span class="params">data</span>) =></span> {</span><br><span class="line"> <span class="keyword">if</span> (kLineData.<span class="property">timestamp</span> === data.<span class="property">time</span>) {</span><br><span class="line"> low = data.<span class="property">value</span></span><br><span class="line"> item.<span class="property">lowOrigin</span> = <span class="literal">true</span></span><br><span class="line"> }</span><br><span class="line"> })</span><br><span class="line"> <span class="keyword">if</span> (<span class="title function_">isNotEmpty</span>(low)) { <span class="comment">// 持续先前的低，画出阶梯线</span></span><br><span class="line"> item.<span class="property">timestamp</span> = kLineData.<span class="property">timestamp</span></span><br><span class="line"> item.<span class="property">low</span> = low</span><br><span class="line"> }</span><br><span class="line"> highLows.<span class="title function_">forEach</span>(<span class="function">(<span class="params">data</span>) =></span> {</span><br><span class="line"> <span class="keyword">if</span> (kLineData.<span class="property">timestamp</span> === data.<span class="property">time</span>) {</span><br><span class="line"> highLow = data.<span class="property">value</span></span><br><span class="line"> item.<span class="property">highLowOrigin</span> = <span class="literal">true</span></span><br><span class="line"> }</span><br><span class="line"> })</span><br><span class="line"> <span class="keyword">if</span> (<span class="title function_">isNotEmpty</span>(highLow)) { <span class="comment">// 持续先前的高低，方便title显示</span></span><br><span class="line"> item.<span class="property">timestamp</span> = kLineData.<span class="property">timestamp</span></span><br><span class="line"> item.<span class="property">highLow</span> = highLow</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> item</span><br><span class="line"> })</span><br><span class="line"> },</span><br><span class="line"> <span class="attr">render</span>: <span class="function">(<span class="params">{ ctx, dataSource, viewport, styles, xAxis, yAxis }</span>) =></span> {</span><br><span class="line"> <span class="keyword">if</span> (dataSource.<span class="property">technicalIndicatorDataList</span>.<span class="property">length</span> <= <span class="number">0</span>) {</span><br><span class="line"> <span class="keyword">return</span></span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">let</span> x = xAxis.<span class="title function_">convertToPixel</span>(<span class="number">0</span>)</span><br><span class="line"> <span class="keyword">let</span> high, low, highLow, highLowX</span><br><span class="line"> dataSource.<span class="property">technicalIndicatorDataList</span>.<span class="title function_">forEach</span>(<span class="keyword">function</span> (<span class="params">data, i</span>) {</span><br><span class="line"> <span class="comment">// 画高线</span></span><br><span class="line"> ctx.<span class="property">textBaseline</span> = <span class="string">'middle'</span></span><br><span class="line"> ctx.<span class="property">textAlign</span> = <span class="string">'center'</span></span><br><span class="line"> ctx.<span class="property">fillStyle</span> = <span class="string">'#fff'</span></span><br><span class="line"> ctx.<span class="property">strokeStyle</span> = <span class="string">'#fff'</span></span><br><span class="line"> <span class="keyword">if</span> (styles.<span class="property">line</span> && styles.<span class="property">line</span>.<span class="property">colors</span> && styles.<span class="property">line</span>.<span class="property">colors</span>[<span class="number">0</span>]) {</span><br><span class="line"> ctx.<span class="property">fillStyle</span> = styles.<span class="property">line</span>.<span class="property">colors</span>[<span class="number">0</span>]</span><br><span class="line"> ctx.<span class="property">strokeStyle</span> = styles.<span class="property">line</span>.<span class="property">colors</span>[<span class="number">0</span>]</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">if</span> (<span class="title function_">isNotEmpty</span>(high) && data.<span class="property">high</span> !== high) {</span><br><span class="line"> ctx.<span class="title function_">beginPath</span>()</span><br><span class="line"> ctx.<span class="title function_">moveTo</span>(x, yAxis.<span class="title function_">convertToPixel</span>(high))</span><br><span class="line"> ctx.<span class="title function_">lineTo</span>(x, yAxis.<span class="title function_">convertToPixel</span>(data.<span class="property">high</span>))</span><br><span class="line"> ctx.<span class="title function_">stroke</span>()</span><br><span class="line"> ctx.<span class="title function_">closePath</span>()</span><br><span class="line"> }</span><br><span class="line"> high = data.<span class="property">high</span></span><br><span class="line"> <span class="keyword">let</span> y = yAxis.<span class="title function_">convertToPixel</span>(high)</span><br><span class="line"> ctx.<span class="title function_">beginPath</span>()</span><br><span class="line"> ctx.<span class="title function_">moveTo</span>(x, y)</span><br><span class="line"> ctx.<span class="title function_">lineTo</span>(x + viewport.<span class="property">dataSpace</span>, y)</span><br><span class="line"> ctx.<span class="title function_">stroke</span>()</span><br><span class="line"> ctx.<span class="title function_">closePath</span>()</span><br><span class="line"> <span class="comment">// 画低线</span></span><br><span class="line"> ctx.<span class="property">fillStyle</span> = <span class="string">'#fff'</span></span><br><span class="line"> ctx.<span class="property">strokeStyle</span> = <span class="string">'#fff'</span></span><br><span class="line"> <span class="keyword">if</span> (styles.<span class="property">line</span> && styles.<span class="property">line</span>.<span class="property">colors</span> && styles.<span class="property">line</span>.<span class="property">colors</span>[<span class="number">1</span>]) {</span><br><span class="line"> ctx.<span class="property">fillStyle</span> = styles.<span class="property">line</span>.<span class="property">colors</span>[<span class="number">1</span>]</span><br><span class="line"> ctx.<span class="property">strokeStyle</span> = styles.<span class="property">line</span>.<span class="property">colors</span>[<span class="number">1</span>]</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">if</span> (<span class="title function_">isNotEmpty</span>(low) && data.<span class="property">low</span> !== low) {</span><br><span class="line"> ctx.<span class="title function_">beginPath</span>()</span><br><span class="line"> ctx.<span class="title function_">moveTo</span>(x, yAxis.<span class="title function_">convertToPixel</span>(low))</span><br><span class="line"> ctx.<span class="title function_">lineTo</span>(x, yAxis.<span class="title function_">convertToPixel</span>(data.<span class="property">low</span>))</span><br><span class="line"> ctx.<span class="title function_">stroke</span>()</span><br><span class="line"> ctx.<span class="title function_">closePath</span>()</span><br><span class="line"> }</span><br><span class="line"> low = data.<span class="property">low</span></span><br><span class="line"> y = yAxis.<span class="title function_">convertToPixel</span>(low)</span><br><span class="line"> ctx.<span class="title function_">beginPath</span>()</span><br><span class="line"> ctx.<span class="title function_">moveTo</span>(x, y)</span><br><span class="line"> ctx.<span class="title function_">lineTo</span>(x + viewport.<span class="property">dataSpace</span>, y)</span><br><span class="line"> ctx.<span class="title function_">stroke</span>()</span><br><span class="line"> ctx.<span class="title function_">closePath</span>()</span><br><span class="line"> <span class="comment">// 画高低线</span></span><br><span class="line"> <span class="keyword">if</span> (<span class="title function_">isNotEmpty</span>(data.<span class="property">highLow</span>) && data.<span class="property">highLowOrigin</span> === <span class="literal">true</span>) {</span><br><span class="line"> <span class="keyword">if</span> (<span class="title function_">isNotEmpty</span>(highLow) && <span class="title function_">isNotEmpty</span>(highLowX)) {</span><br><span class="line"> ctx.<span class="property">fillStyle</span> = <span class="string">'#fff'</span></span><br><span class="line"> ctx.<span class="property">strokeStyle</span> = <span class="string">'#fff'</span></span><br><span class="line"> <span class="keyword">if</span> (styles.<span class="property">line</span> && styles.<span class="property">line</span>.<span class="property">colors</span> && styles.<span class="property">line</span>.<span class="property">colors</span>[<span class="number">2</span>]) {</span><br><span class="line"> ctx.<span class="property">fillStyle</span> = styles.<span class="property">line</span>.<span class="property">colors</span>[<span class="number">2</span>]</span><br><span class="line"> ctx.<span class="property">strokeStyle</span> = styles.<span class="property">line</span>.<span class="property">colors</span>[<span class="number">2</span>]</span><br><span class="line"> }</span><br><span class="line"> ctx.<span class="title function_">beginPath</span>()</span><br><span class="line"> ctx.<span class="title function_">moveTo</span>(highLowX, yAxis.<span class="title function_">convertToPixel</span>(highLow))</span><br><span class="line"> ctx.<span class="title function_">lineTo</span>(x, yAxis.<span class="title function_">convertToPixel</span>(data.<span class="property">highLow</span>))</span><br><span class="line"> ctx.<span class="title function_">stroke</span>()</span><br><span class="line"> ctx.<span class="title function_">closePath</span>()</span><br><span class="line"> }</span><br><span class="line"> highLow = data.<span class="property">highLow</span></span><br><span class="line"> highLowX = x</span><br><span class="line"> }</span><br><span class="line"> <span class="comment">// 画价格</span></span><br><span class="line"> <span class="keyword">if</span> (data.<span class="property">high</span> !== <span class="literal">undefined</span> && data.<span class="property">highOrigin</span> === <span class="literal">true</span>) { <span class="comment">// 画高价</span></span><br><span class="line"> <span class="keyword">let</span> text = <span class="title class_">Number</span>.<span class="built_in">parseFloat</span>(data.<span class="property">high</span>).<span class="title function_">toFixed</span>(<span class="number">2</span>)</span><br><span class="line"> ctx.<span class="property">fillStyle</span> = <span class="string">'#fff'</span></span><br><span class="line"> <span class="keyword">if</span> (styles.<span class="property">line</span> && styles.<span class="property">line</span>.<span class="property">colors</span> && styles.<span class="property">line</span>.<span class="property">colors</span>[<span class="number">0</span>]) {</span><br><span class="line"> ctx.<span class="property">fillStyle</span> = styles.<span class="property">line</span>.<span class="property">colors</span>[<span class="number">0</span>]</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">let</span> offset = <span class="number">10</span></span><br><span class="line"> <span class="keyword">let</span> y = yAxis.<span class="title function_">convertToPixel</span>(data.<span class="property">high</span>)</span><br><span class="line"> <span class="keyword">for</span> (<span class="keyword">let</span> i = <span class="number">2</span>; i < offset - <span class="number">1</span>; i += <span class="number">2</span>) {</span><br><span class="line"> ctx.<span class="title function_">fillText</span>(<span class="string">'.'</span>, x, y - i)</span><br><span class="line"> }</span><br><span class="line"> ctx.<span class="title function_">fillText</span>(text, x, y - offset)</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">if</span> (data.<span class="property">low</span> !== <span class="literal">undefined</span> && data.<span class="property">lowOrigin</span> === <span class="literal">true</span>) { <span class="comment">// 画低价</span></span><br><span class="line"> <span class="keyword">let</span> text = <span class="title class_">Number</span>.<span class="built_in">parseFloat</span>(data.<span class="property">low</span>).<span class="title function_">toFixed</span>(<span class="number">2</span>)</span><br><span class="line"> ctx.<span class="property">fillStyle</span> = <span class="string">'#fff'</span></span><br><span class="line"> <span class="keyword">if</span> (styles.<span class="property">line</span> && styles.<span class="property">line</span>.<span class="property">colors</span> && styles.<span class="property">line</span>.<span class="property">colors</span>[<span class="number">1</span>]) {</span><br><span class="line"> ctx.<span class="property">fillStyle</span> = styles.<span class="property">line</span>.<span class="property">colors</span>[<span class="number">1</span>]</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">let</span> offset = <span class="number">15</span></span><br><span class="line"> <span class="keyword">let</span> y = yAxis.<span class="title function_">convertToPixel</span>(data.<span class="property">low</span>)</span><br><span class="line"> <span class="keyword">for</span> (<span class="keyword">let</span> i = <span class="number">2</span>; i < offset - <span class="number">5</span>; i += <span class="number">2</span>) {</span><br><span class="line"> ctx.<span class="title function_">fillText</span>(<span class="string">'.'</span>, x, y + i)</span><br><span class="line"> }</span><br><span class="line"> ctx.<span class="title function_">fillText</span>(text, x, y + offset)</span><br><span class="line"> }</span><br><span class="line"> x += viewport.<span class="property">dataSpace</span></span><br><span class="line"> })</span><br><span class="line"> }</span><br><span class="line">})</span><br></pre></td></tr></table></figure><p></p><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" 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