倍量上穿成交量的120均线，随后3天成交量持续大于120均线选股公

倍量:=V>REF(V,1)*2;
MAV120:=MA(V,120);
金叉:=CROSS(倍量,MAV120);
AA:=BARSLAST(金叉)<=4;
BB:=COUNT(V>MAV120,3)=3;
AA AND BB;