[股票基础知识]买入埋伏主图之布林开口选股指标公式

BOLL:=MA(CLOSE,20);
UPPER:=(BOLL+2*STD(CLOSE,20));
LOWER:=BOLL-2*STD(CLOSE,20);
DD:=UPPER-LOWER;
布林开口:CROSS(0.5,DD=LLV(DD,30));