主题：请问这段代码为何在图表上没有收盘平仓的信号？

//多单止损
cond32:=close<Ma(close,5);
if holding>0 then
begin
bkpp:=AVGENTERPRICE;
if close<bkpp-losspoint and cond32 then 多单止损:SELL(1,0,THISCLOSE);//平多
exit;
end

//空单止损
cond41:=close>MA(close,5);
if holding<0 then
begin
skpp:=AVGENTERPRICE;
if close>skpp+losspoint and cond41 then 空单止损：SELLSHORT(1,0,THISCLOSE);//平空
exit;
end

//收盘平仓
if time >151200 and holding<>0 then
begin
 if holding<0 then 收盘平空：SELLSHORT(1,0,THISCLOSE);//平空
 if holding>0 then 收盘平多：SELL(1,0,THISCLOSE);//平多
 end