MA30:=MA(C,30);
MA60:=MA(C,30);
MA90:=MA(C,30);
MA120:=MA(C,30);
选股:count(cross(ma30,ma60),3)=1 and count(cross(ma30,ma90),3)=1 and count(cross(ma30,ma120),3)=1 and count(cross(ma60,ma90),3)=1 and count(cross(ma60,ma120),3)=1 and count(cross(ma90,ma120),3)=1;