主题：请教编程中时间的表达

variable:n=0;

c_1:=callstock(stklabel,vtclose,6,-1);//前一日收盘价
c_0:=callstock(stklabel,vtopen,6,0);//今日开盘价

hh:=hhv(h,enterbars+1);//开仓后最高价
nn1:=h-enterprice;//多单盈利点数

ll:=llv(l,enterbars+1);//开仓后最低价
nn2:=enterprice-l;//空单盈利点数

bbi:=(ma(c,3)+ma(c,6)+ma(c,12)+ma(c,24))/4;//定义BBI指标
bbi60:stkindi('','bbi',0,5);//小时线BBI

//开仓
if n=0 and h>c_0 and time>090200 and time<145800 then begin
开盘开多:buy(holding=0,1,market);
n:=1;
end

if n=0 and l<c_0 and time>090100 and time<145800 then begin
开盘开空:buyshort(holding=0,1,market);
n:=1;
end

if n>=1 and h>c_0 and h>bbi60+f and exitbars>g and time<145800 then begin
二次开多:buy(holding=0,1,market);
n:=n+1;
end

if n>=1 and l<c_0 and l<bbi60-f and exitbars>g and time<145800 then begin
二次开空:buyshort(holding=0,1,market);
n:=1;
end

//止盈
if holding>0 and (hh-h)/c_0*1000>d and nn1>e then 回撤平多:sell(1,0,market);

if holding<0 and (l-ll)/c_0*1000>d and nn2>e then 回撤平空:sellshort(1,0,market);

//止损
if enterprice<c_1 and (h-c_1)/c_1*1000>b and holding<1 then 前收止空:sellshort(1,0,market);

if enterprice>c_1 and (c_1-l)/c_1*1000>b and holding>1 then 前收止多:sell(1,0,market);

if holding<0 and (h-enterprice)/c_0*1000>a then
空单止损:sellshort(1,0,market);//空单止损

if holding>0 and (enterprice-l)/c_0*1000>a then
多单止损:sell(1,0,market);//多单止损