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I believe that the expectation is that you would run a filtering exploration first, to identify those stocks that meet your desired criteria.
You would then create a watchlist of the results and use that watchlist as your ApplyTo for future runs. Your main AFL could then run without checking for any filtering at all, since the pre screening process would have assured that for you.
Mike
--- In amibroker@xxxxxxxxxxxxxxx, "gmorlosky" <gmorlosky@xxx> wrote:
>
> Hi Mike - setting it in the AA window, means I only have a single selection. What if I want to pre-filter on S&P500 AND S&P400 ? If I do that I in the code then each symbol is processed until it hits the filter at the end and that's a lot of wasted CPU time.
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Mike" <sfclimbers@> wrote:
> >
> > Why do you need it in the code as opposed to setting it in the AA window before running the code?
> >
> > If you are trying to do something in an automated way, the AmiBroker automation object will let you set all the filters you want before executing the exploration.
> >
> > Mike
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "gmorlosky" <gmorlosky@> wrote:
> > >
> > > Thanks, but not the issue. The filter within an Explore is a post-filter. I need to pre-filter, which is the ApplyTo.
> > >
> > > --- In amibroker@xxxxxxxxxxxxxxx, Aron <aron.groups@> wrote:
> > > >
> > > > see: AFL Function Reference, Information/Categories
> > > >
> > > > example:
> > > > Filter = GroupID() == 7 OR GroupID() == 9;
> > > > AddTextColumn( GroupID( 1 ), "Group name" );
> > > >
> > > > gmorlosky wrote:
> > > > > I see that Automatic Analysis has an "ApplyTo" function which essentially is the pre-filter to any code being run. Can ApplyTo be coded into an Explore at the very beginning ?
> > > > >
> > > > >
> > > > >
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