用Polt类画线的问题

老师好，我按21年1月7日答疑课《用Plot类画线》中的讲解，编写了如下公式，但其中红色的那段代码画线有误，如后图所示。故想请教一下原因，谢谢！ Params Numeric FastLength(12); Numeric SlowLength(26); Numeric MACDLength(9); Vars Numeric MACDDiff; Numeric AvgMACD; Numeric MACDValue; Series<Numeric> ma1; Series<Numeric> ma2; plot my_plot; Events OnInit() { my_plot.figure(0); my_plot.setOption("ma1","x-format","time"); my_plot.setOption("ma1","x-format","Numeric"); my_plot.setOption("MACD1","color",red); my_plot.setOption("MACD2","color",Green); } OnBar(ArrayRef<Integer> indexs) { ma1 = XAverage( Close, FastLength); ma2 = XAverage( Close, SlowLength); MACDDiff = ma1 - ma2; AvgMACD = XAverage(MACDDiff,MACDLength); MACDValue = MACDDiff - AvgMACD; //主图显示 PlotAuto("ma1",ma1); PlotAuto("ma2",ma2); //子图显示 my_plot.line("MACDDiff",Date+time,MACDDiff); my_plot.line("MACDDEA",Date+Time,AvgMACD); If (MACDValue >= 0) { my_plot.barv("MACD1",Date+Time,MACDValue,0); //此段代码显示有误 } Else { my_plot.barv("MACD2",Date+Time,MACDValue,0); } my_plot.line("零线",Date+Time,0); }