Params
	Numeric FastLength(12);
	Numeric SlowLength(26);
	Numeric MACDLength(9);
Vars
	Numeric MACDDiff; 
	Numeric AvgMACD;
	Numeric MACDValue;
Events
	OnBar(ArrayRef<Integer> indexs)
	{
		Range[0:DataSourceSize() - 1]
		{
			MACDDiff = XAverage( Close, FastLength ) - XAverage( Close, SlowLength ) ;	
			AvgMACD = XAverage(MACDDiff,MACDLength);
			MACDValue = 2 * (MACDDiff - AvgMACD);
			PlotNumeric("MACDDiff",MACDDiff);
			PlotNumeric("MACDDEA",AvgMACD);
			If (MACDValue >= 0)	 
				PlotAuto("MACD",MACDValue,0,Red,Enum_Bar); 
			Else
				PlotAuto("MACD",MACDValue,0,Green,Enum_Bar); 
			PlotNumeric("零线",0); 	 
		}
	}

自己新建了一个公式，将系统自带的MACD复制过去，但重新加载自建的公式后，就变成这样，哪里出错了？