来源：Internet，编辑：股旁网，2011-09-27
N:=20; boll:=MA(CLOSE,N); UB:=BOLL+2*STD(CLOSE,N); LB:=BOLL-2*STD(CLOSE,N); DD:=CLOSE>BOLL AND O>BOLL AND CLOSE<UB; KK:=COUNT(DD,20)>=3; kdR:=CLOSE>UB; XG:FILTER(KK AND KDR,20);
