if cross(c,ma(c,20)) then buy(1,50%,marketr);
if cross(ma(c,5),ma(c,20)) then buy(1,50%,marketr);
if cross(ma(c,20),c) then sell(1,holding,marketr);
if cross(ma(c,10),c) then sell(1,holding/2,marketr);
if cross(c,ma(c,10)) then buy(1,25%,marketr);
多头的图表部分如上,空头部分用户理解后类似的写法即可