主题：请老师帮写下程序

先平后开的顺序

ma1:=ma(c,120);
ma2:=ma(c,20);
ma3:=ma(c,10);
sellshort(cross(h,ma3),1,market);
buy(cross(h,ma1),1,market);
buy(cross(ma2,l),1,market);
sell(cross(ma3,l),1,market);
buyshort(cross(ma1,l),1,market);