BOLL布林极限自编超买逃顶

N:=25;
A:=1,COLORGREEN;
顶:1.,COLORGREEN;
BOLL:=MA(CLOSE,N);
UPPER:=BOLL+2*STD(CLOSE,N);
LOWER:=BOLL-2*STD(CLOSE,N);
BB:(C-LOWER)/(UPPER-LOWER),COLORYELLOW,LINETHICK2;
买入:CROSS(BB,0),COLORMAGENTA;

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