It is resolved by using:
SetOption("PriceBoundChecking", False);
Charles
--- In amibroker@yahoogroups.com, "chuck_win" <ch...@...> wrote:
>
> Hi,
>
> I want to compare the close price at 9:30 am with the yesterday's close
> price.
>
> Thanks very much for you assistance.
>
> Charles
>
> --- In amibroker@yahoogroups.com, reinsley <reinsley@> wrote:
> >
> >
> > Hi,
> >
> > Did you see *gapup() and **gapdown()* ?
> >
> > And associated formulas into AB library...
> >
> > http://www.amibroker.com/guide/afl/afl_view.php?id=58
> >
> > Best regards
> >
> >
> > Le 09/07/2010 20:58, chuck_win a écrit :
> > >
> > > I want to find the open gaps. I use 30m bar. I check price at 9:30am
> > > very day. if open price > yesterday's close * 1.10, buy at yesterday
> > > close price and sell at open price at 9:30am.
> > >
> > > my code below doesn't work.
> > >
> > > Thanks very much to any assistance.
> > >
> > > Charles
> > >
> > > Perc = Optimize("Perc", 10, 3, 10, 1);
> > >
> > > //=============================================== buy rules
> > > Buyrule1 = TimeNum() == 93000 AND Open > Ref(Close, -1) * (1 + Perc/100);
> > >
> > > //=============================================== sell rules
> > > Sellrule1 = TimeNum() == 93000;
> > >
> > > //=============================================== trade
> > > Sell = 0;
> > > Buy = Buyrule1;
> > > BuyPrice = Ref(Close, -1);
> > > Sell = Sellrule1;
> > > SellPrice = Open;
> > > // Remove excess signals
> > > Buy = ExRem(Buy, Sell);
> > > // Remove additional signals,
> > > Sell = ExRem(Sell, Buy);
> > >
> > >
> >
>
