网友求助:

MID : MA(CLOSE,20),colorwhite;
UPPER:MID + 2*STDDEV(CLOSE,20),coloryellow;
LOWER:MID - 2*STDDEV(CLOSE,20),colorff00ff;(
 

 

解答如下:

MID:=MA(C,20);
CROSS(C>MID,0.5);