策略加信号和在主图上显示，老师们教下，或者给个视频网址我学下

如何在让该公式在主图上显示信号，我现在只能在子图上看到这个图形Params Numeric Length(9); Numeric SlowLength(3); Numeric SmoothLength(3);Vars Series<Numeric> kValue; Series<Numeric> DValue; Series<Numeric> JValue; Defs Numeric SMAValue(Numeric Price,Numeric Length,Numeric Weight) { if(InvalidNumeric == Price || InvalidNumeric == Length || InvalidNumeric == Weight) { return InvalidNumeric; } return SMA(Price,Length,Weight); }Events OnReady() { SetBackBarMaxCount(1+Max(Max(Length,SlowLength),SmoothLength)); } OnBar(ArrayRef<Integer> indexs) { Range[0:DataSourceSize() - 1] { Numeric HighestValue = HighestFC(High, Length); Numeric LowestValue = LowestFC(Low, Length); Numeric k = (Close - LowestValue)/(HighestValue-LowestValue)*100; Numeric kValue = SMAValue(k,SlowLength,1); Numeric DValue = SMAValue(KValue,SmoothLength,1); Numeric JValue =(3*KValue - 2*DValue); if(kValue <> InvalidNumeric) { PlotNumeric("K",KValue); } if(DValue <> InvalidNumeric) { PlotNumeric("D",DValue); } if(kValue <> InvalidNumeric && DValue <> InvalidNumeric) { PlotNumeric("J",JValue); } if(JValue > kValue && DValue > 0 && MarketPosition <> 1) { BuyToCover(0, Open); Buy(0, Open); } if(JValue < kValue && DValue > 0 && MarketPosition <> 1) { Sell(0, Open); SellShort(0, Open); } } }