N:=20;MID:=MA(C,N);VART1:=POW((C-MID),2);VART2:=MA(VART1,N);VART3:=SQRT(VART2);UPPER:=MID+2*VART3;LOWER:=MID-2*VART3;中轨:REF(MID,1),COLORFFFFFF;布林上轨:REF(UPPER,1),COLOR00FFFF;LB:=REF(LOWER,1),COLORFF00FF;