昨阴:=REF(CLOSE,1)<REF(OPEN,1);
今阳:=CLOSE>OPEN;
阳包阴1:=昨阴 AND 今阳 AND OPEN<REF(CLOSE,1) AND CLOSE>REF(OPEN,1);
跌幅:= (REF(C,20)-C)/C>0.5;
AA:=REF(C,1)<REF(O,1) AND ( REF(O,1) -REF(C,1))/REF(C,2)>0.02;
BB:=O<=REF(C,1) AND C>REF(O,1);
阳包阴2:=AA AND BB;
低点阳包阴:跌幅 AND (阳包阴1 OR 阳包阴2){};
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