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Herman,
I just noticed that your EMPTY is -1^10, ie equal to 1.
So, your equivalent formula is
EMPTY = 1;
AddToComposite(IIf(Open == 1,0,1),"~DataPresent","v",3);
Do you have in the group of your gif some stocks with open==1 ?
This would give some explanation.
DT
PS The huge negative symbol in AFL is -1e10
--- In amibroker@xxxx, "dtsokakis" <TSOKAKIS@xxxx> wrote:
> Of course I receive an identical result list with your
> EMPTY = -1^10;
> AddToComposite(IIf(Open == EMPTY,0,1),"~DataPresent","v",3);
> Buy= 0;
> f=Foreign("~datapresent","v");
> Filter=f!=101;
> AddColumn(f,"");
> EXACTLY the same results.
> To avoid any misuderstanding :your formula works, I just think
> Amibroker does not use the open==EMPTY hypothesis, because if the
> ADLAC is not present on 16/4/2002, there is no reference for ADLAC
> this date.
> My opinion is from experience, Tomasz knows how AddToComposite()
> works.
> DT
> --- In amibroker@xxxx, "Dimitris Tsokakis" <TSOKAKIS@xxxx> wrote:
> > I respectfully disagree. If you are not concerned about bar-by-
bar
> accuracy
> > than you are correct. In that case the "1" method works fine. As
> long as you
> > know that this method will pick up holes of several days but that
> it will
> > not pick up single bar holes.
> >
> >
> > Herman,
> > Of course we speak for daily search, bar-by-bar.
> > I have in my ^NDX 4 experimental holes on
> > 6/1/2000 [1], 15/2/2000 [1] and 1/3/2000[2]
> > plus the missing ADLAC after 15/4/2002.
> > As you see from the exploration, the population
> > is different from 101 exactly these dates.
> > I do not understand the conditions of your graph.
> > The
> > AddToComposite(1,"~count","v");
> > Buy=0;
> > scans bar-by-bar every stock for each date.
> > If the stock is present, it adds an 1 and moves to the next stock.
> > If ADLAC is not present on 16/4/2002, then the sum will be 100
> > for the certain date.
> > It is impossible to have a 20% error, there should be another
> > reason for your results.
> > Dimitris Tsokakis
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