0轴下方二次金叉且第二次金叉高于第一次金叉：

DIF:=EMA(CLOSE,12)-EMA(CLOSE,26);
DEA:=EMA(DIF,9);
AA:=BARSLAST(REF(CROSS(DIF,DEA),1));

二次金叉:CROSS(DIF,DEA) AND DIF>REF(DIF,AA+1) AND AA<20 AND DIF<0;