tradingview均线系统代码: //@version=4 study(title="均线系统", shorttitle="均", overlay = true ) sma20 = sma(close,20) sma60 = sma(close,60) sma120 = sma(close,120) ema20 = ema(close,20) ema60 = ema(close,60) ema120 = ema(close,120) plot(sma20,color=color.black,title=