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INPUT:grid(50,1,11111,1);
variable:level=0;
n : =5;
dist:=barslast(holding=0 );
oo:=ref(open,dist);
kaishi：=3000;
shang:=kaishi+n*grid*mindiff;
xia:=kaishi -n*grid*mindiff;
oo:=ref(open,dist);
kaishi：=3000;
shang:=kaishi+n*grid*mindiff;
xia:=kaishi -n*grid*mindiff;
if l < xia or h >shang then begin

if holding=0 then begin
dnprice:=oo-grid*mindiff;

           if low<=dnprice then begin
               buy(1,1,limitr,dnprice);
                level:=-1;
           end
       end
       if holding=0 then begin
             upprice:=oo+grid*mindiff;

           if high>=upprice then begin
                buyshort(1,1,limitr,upprice);
                level:=1;
            end
        end
     if holding>0 then begin
              upprice:=oo+(level+1)*grid*mindiff;
                dnprice:=oo+(level-1)*grid*mindiff;

           if high>=upprice then begin
                sell(1,1,limitr,upprice);
                level:=level+1;
            end

           if low<=dnprice then begin
                buy(1,1,limitr,dnprice);
               level:=level-1;
            end
     end
         if holding<0   then begin
                upprice:=oo+(level+1)*grid*mindiff;
                dnprice:=oo+(level-1)*grid*mindiff;

             if low<=dnprice then begin
                   sellshort(1,1,limitr,dnprice);
                    level:=level-1;
             end

              if high>=upprice then begin
                     buyshort(1,1,limitr,upprice);
                      level:=level+1;
              end
        end
        if holding>0 then BEGIN
        if low < oo-n*grid*mindiff then begin
             sell(1,holding,limitr,close);
             end
             end
        if holding < 0 then begin
         if h > oo+n*grid*mindiff then begin
          sellshort(1,holding,limitr,close);
          end
          end


end