主题：[求助]求助，这个如何限制只开一手

模型如下，9:59:00这个时间开的仓位如何才能固定只开一手呢？其他时间的开仓都固定了一手，就是这个位置不行啊？

ss:=REFDATE(CLOSE,date,092900);
if time=095900 then
begin
buy(holding=0 and C<=ss+17.03,1,market);
buyshort(holding=0 and C>=ss-17.03,0,market);
end
ss:=REFDATE(CLOSE,date,095900);
if time=101300 then
begin
sellshort(holding<0 and  C>=ss-17.03,0,market);
sell(holding>0 and C<=ss+17.03,0,market);
buy(holding=0 and C<=ss+17.03,1,market);
buyshort(holding=0 and C>=ss-17.03,1,market);
end
ss:=REFDATE(CLOSE,date,101300);
if time=105900 then
begin
sellshort(holding<0 and  C>=ss-17.03,0,market);
sell(holding>0 and C<=ss+17.03,0,market);
buy(holding=0 and C<=ss+17.03,1,market);
buyshort(holding=0 and C>=ss-17.03,1,market);
end
ss:=REFDATE(CLOSE,date,105900);
if time=112800 then
begin
sellshort(holding<0 and  C>=ss-17.03,0,market);
sell(holding>0 and C<=ss+17.03,0,market);
buy(holding=0 and C<=ss+17.03,1,market);
buyshort(holding=0 and C>=ss-17.03,1,market);
end
ss:=REFDATE(CLOSE,date,112800);
if time=135900 then
begin
sellshort(holding<0 and  C>=ss-17.03,0,market);
sell(holding>0 and C<=ss+17.03,0,market);
buy(holding=0 and C<=ss+17.03,1,market);
buyshort(holding=0 and C>=ss-17.03,1,market);
end
ss:=REFDATE(CLOSE,date,135900);
if time=142900 then
begin
sellshort(holding<0 and  C>=ss-17.03,0,market);
sell(holding>0 and C<=ss+17.03,0,market);
buy(holding=0 and C<=ss+17.03,1,market);
buyshort(holding=0 and C>=ss-17.03,1,market);
end

if time=145800 then
begin
sellshort(holding<0 ,0,market);
sell(holding>0 ,0,market);
end