可运行的tradingview-websocket实例，一边学习一边使用
这是一个tradingview和websocket结合使用的案例
代码来源于 这里,有修改，数据来源fcoin。
修复了原代码的一些bug，主要是数据接收处理的逻辑。另外加了参数配置和皮肤，black和white两个皮肤，皮肤变量skin，可设置。
线上预览 demo。
数据来源 www.fcoin.com,年前已经被墙，请自备梯子，，，，，，，，，，，，
Demo's not working.
err:socket.js:32 WebSocket connection to 'wss://api.fcoin.pro/v2/ws' failed: 比如说创建了一个volume的指标，默认会显示成volume(20):xxx,想把这个改成自定义的标题“成交量：”，这样可以实现吗
vue 使用的时候一直报下面这个错误
charting_library.min.js:1 Uncaught TypeError: i.contentWindow.widgetReady is not a function
at HTMLIFrameElement.n (charting_library.min.js:1)
> <div id="tv_chart_container" style="height: 530px"></div>
<ul id="symbolName">
<li data-symbol="btcusdt">BTC/USDT</li>
<li data-symbol="ethusdt">ETHUSDT</li>
<li data-symbol="eosusdt">EOS/USDT</li>
<li data-symbol="xrpusdt">XRP/USDT</li>
<li data-symbol="ltcusdt">LTC/USDT</li>
</ul>
K线一直走 我想加一个标记买入点 应该怎么加呢 现在我只能达到画线
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