指标提示+20线支撑=介入!!指标提示+55线支撑=介入!!指标提示+无均线支撑+收阳=介入!!
A:=C<O; B:=COUNT(A,4)=4; D:=OBV-MA(OBV,30); E:=MA(C,20)>REF(MA(C,20),1) AND MA(C,55)>REF(MA(C,55),1); XG:B AND D>0 AND E;
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