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[amibroker] Re: New Variable Class



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Dimitris,

Yes I did notice that, but I was not going to embarrass you by
pointing out that little BUG... <LOL>  (Has anyone seen my dunce hat?)

Good work and thanks,

Phsst

--- In amibroker@xxxxxxxxxxxxxxx, "DIMITRIS TSOKAKIS" <TSOKAKIS@xxxx>
wrote:
> Phsst,
> But, did you see the results list ?
> If positive, you should notice 300 *same* numbers, which was 300 same 
> MeanRSIs !!!
> OK, it is written in the user's guide that we will have some delays 
> with GetCategorySymbols(), but not so much !!!
> Dimitris Tsokakis
> 
> --- In amibroker@xxxxxxxxxxxxxxx, "Phsst" <phsst@xxxx> 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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