MA30:=MA(CLOSE,30);MA60:=MA(CLOSE,60);MA120:=MA(CLOSE,120);牛:=(EXPMA(CLOSE,500)-REF(EXPMA(CLOSE,500),1))/REF(EXPMA(CLOSE,500),1)*100;CROSS(EXPMA(牛,21),EXPMA(牛,60)) AND C>MA30 AND C>MA60 AND C<MA120;