编一个（MACD在0轴以下 DIF上穿DEA又再次下穿DEA且kdj中d小于-20

AA:= CROSS(MACD.DIF,MACD.DEA);
BB:=BARSLAST(AA)<10;
XG:CROSS(MACD.DEA,MACD.DIF) AND MACD.DEA<0 AND MACD.DIF<0 AND BB AND KDJ.D<-20;