主题：老师帮我编模型。谢谢

ma5:=ma(c,5);

ma10:=ma(c,10);

ma15:=ma(c,15);

if cross(ma5,ma10) and close>ma15 then buy(holding=0,1,marketr);

if cross(ma10,ma5) and close<ma15 then sell(1,0,marketr);

ma5:=ma(c,5);

ma10:=ma(c,10);

ma15:=ma(c,15);

if cross(ma5,ma10) and close>ma15 then begin

   sellshort(1,0,thisclose);

   buy(holding=0,1,marketr);

end

if cross(ma10,ma5) and close<ma15 then begin

    sell(1,0,marketr);

    buyshort(holding=0,1,marketr);

end

我回测没有开空