大单比例线上穿小单比例线或小单比例线<0的函数如何编写　[大智慧]

大单比例:=if(count(c,0)<=1,0,sum((ordervol(1,2)-ordervol(2,2)),0)/sum(ordervol(1,0),0)*100)-if(count(c,0)<=1,0,sum((ordervol(1,3)-ordervol(2,3)),0)/sum(ordervol(1,0),0)*100),coloryellow;
小单比例:=if(count(c,0)<=1,0,sum((ordervol(1,0)-ordervol(1,1))-(ordervol(1,0)-ordervol(2,1)),0)/sum(ordervol(1,0),0)*100);

xg:cross(大单比例,小单比例) or 小单比例<0;