主题：第一次开仓和第二次开仓的条件不同问题？

variable:x:=0,y:=0;
if time>000930 and time<001530 and A and x=0 then
begin
   sellshort(1,0,market);
   buy(1,1,market);
   x:=x+1;
end

if time>000930 and time<001530 and b and y=0 then
begin
   sell(1,0,market);
   buyshort(1,1,market);
   y:=y+1;
end

if time>000930 and time<001530 and A and C and x=1 then
begin
   buy(1,1,market);
end

if time>000930 and time<001530 and A and x=1 then
begin
   sellshort(1,0,market);
end

if time>000930 and time<001530 and B and D and y=1 then
begin
   buyshort(1,1,market);
end

if time>000930 and time<001530 and B and y=1 then
begin
   sell(1,0,market);
end

老师你好！你帮我写的这个程序只能管住第二次开仓的情况，不能管住第三次开仓的情况！ 我开了第二次后要y=y+1+1吗？