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Hi,
Im all for the New Variable class too.
I tend to call it "The Global Cross Ticker Variable", But each to his own.
I also find the for loop methods often too time consuming.
Regards
Michael.
At 10:09 AM 6/11/2003, you wrote:
>Dimitris,
>
>You are a Master at taking AB AFL into uncharted territory.
>
>I ran this Explore against a 300 issue watchlist for N = 1 last days.
>I took 12 minutes to run.
>
>Too long... A new persistant variable class with simple one-pass
>reporting would be quick and uncomplicated.
>
>Regards,
>
>Phsst
>--- In amibroker@xxxxxxxxxxxxxxx, "DIMITRIS TSOKAKIS" <TSOKAKIS@xxxx>
>wrote:
> > Phsst,
> > the procedure is described at GetCategorySymbols( category, index )
> > example.
> > Here is, for example, the MeanRSI
> >
> > function MeanRSIforGroup( listnum )
> > {
> > list = GetCategorySymbols( categoryGroup, listnum );
> > Average = 0;
> > for( i = 0; ( sym = StrExtract( list, i ) ) != ""; i++ )
> > {
> > C1 = Foreign( sym, "C" );
> > f=RSIa(C1,14);
> > if( i == 0 ) Average = f;
> > else Average = Average + f;
> > }
> > return Average / i;
> > }
> > Plot( MeanRSIforGroup( 254 ), "MeanRSI", colorPink );
> > Filter=MeanRSIforGroup(254)>50;
> > AddColumn(MeanRSIforGroup( 254 ), "");
> >
> > It is a bit slow, but it is one-step composite creation for both
> > IB/AA.
> > Dimitris Tsokakis
> > --- In amibroker@xxxxxxxxxxxxxxx, "Phsst" <phsst@xxxx> wrote:
> > > Currently, all variables (global and local) reflect information
> > about
> > > the current symbol only.
> > >
> > > To perform calculations against multiple securities, you must use
> > > AddToComposite which restricts the user to O,H,L,C,V,OI fields along
> > > with their pre-defined constraining formats which preclude the
> > > calculation and storage of very large numbers. It also usually
> > > requires at least two passes against separate AFL or AFL/IB afl code
> > > to work with the results. There is certainly a need for
> > > AddToComposite, but I think there is also a need for a simpler set
> > of
> > > composite values.
> > >
> > > I'd like to see a new variable class within AFL for computations
> > > across the entire database or watchlist. For lack of a better word,
> > a
> > > "composite variable" whose value is maintained across multiple
> > > securities and which the AFL engine does not initialize with each
> > new
> > > symbol. Also, a composite variable that can be displayed with
> > > AddColumn just like the other variables using Filter = LastBar
> > logic.
> > >
> > > This would allow the user to put together some quick, one-pass
> > > explorations for calculating multiple issue stats and to display
> > those
> > > figures in the same afl. No ~Composite files would be created, and
> > > very large numbers could be calculated and displayed using more
> > > flexable variable type declarations of float (or others).
> > >
> > > I'm posting this here to see if I am alone in wanting this feature,
> > in
> > > which case I won't pass it along to TJ as a suggestion.
> > >
> > > Comments?
> > >
> > > Phsst
>
>
>
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