ma5:ma(c,5);

ma10:ma(c,10);

variable:n=0;

if cross(ma5,ma10)  and holding=0 and n=0 then begin

    buy(holding=0,1,market);

    n:=1;

end

if cross(ma10,ma5) then begin

   sell(holding>0,1,market);

   buyshort(holding=0,1,market);

end

if cross(ma5,ma10) and holding>0 and n=1 then begin

    sellshort(holding<0,1,market);

end