把这个突破公式改成预警公式

编写要求：

如何把这个突破公式改成预警公式？请老师们帮个忙，谢谢！MA20:=MA(C,20);AA:V>=REF(V,1)*2.0 AND CROSS(C,MA20);MID := MA(CLOSE,90);UPPER:= MID+1*STD(CLOSE,90);LOWER:= MID-1*STD(CLOSE,90);BB:V>=REF(V,1)*2.0 AND CROSS(C,MID);AA AND BB;

解答：

MA20:=MA(C,20);
AA:V>=REF(V,1)*2.0 AND CROSS(C,MA20);
MID := MA(CLOSE,90);
UPPER:= MID+1*STD(CLOSE,90);
LOWER:= MID-1*STD(CLOSE,90);
BB:=V>=REF(V,1)*2.0 AND CROSS(C,MID);
YJ:AA AND BB;