MACD零轴下二次金叉且同时出现底背离选股公式。 编写条件：编写方法：DIFF:=EMA(CLOSE,12)-EMA(CLOSE,26);DEA:=EMA(DIFF,9);A1:=BARSLAST(REF(OSS(DIFF,DEA),1));:REF(CLOSE,A1+1)>CLOSE AND DIFF>REF(DIFF,A1+1) AND CROSS(DIFF,DEA);