主题：模型编写求助

ma5:ma(c,5);
ma10:ma(c,10);
variable:cx:=0;
cond:cross(c,ma5) ;
if cross(ma5,ma10) then  buy(1,2,market);
cc:holding/2;
bb:exitbars;
//if ma5>ref(ma5,1) and ref(ma5,1)<ref(ma5,2) and ma5>ma10 then buy(1,2,market);
if holding>0 and cond and cx=0 then
begin
   sell(1,holding/2,market);
   cx:=1;
end
dd:cx;
if holding>0 and cond and cx=1 and EXITBARS>0 then
begin
   sell(1,0,market);
   cx:=0;
end