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True, it will take CPU time
You can develop your code such that is modular:
Condition_one = Volume > x;
Code using Condition_One ...
..
Filter = Condition_one and ....
AddColumn(....)
----- Original Message -----
From: "mmqp" <mmqp@xxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Friday, September 12, 2003 4:37 PM
Subject: [amibroker] Re: FILTER questions.
> Thanks for the answer. One of my question was if the stock average
> volume is less than 50000 then it shoud skip this stock, then if
> FILTER statement should be placed at the end then AFL codes above
> FILTER will be executed which would waste CPU. Is this true?
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Ara Kaloustian" <ara1@xxxx> wrote:
> > Filter is used for explorations only. It should come before the
> addcolumn
> > statements.
> >
> > Normally place the exploration at the end so it does not interfere
> with
> > anything else
> >
> >
> > AFL Code...
> >
> > Filter = xxxx;
> > addcolumn(...)
> >
> > ----- Original Message -----
> > From: "mmqp" <mmqp@xxxx>
> > To: <amibroker@xxxxxxxxxxxxxxx>
> > Sent: Friday, September 12, 2003 3:54 PM
> > Subject: [amibroker] FILTER questions.
> >
> >
> > > Hi,
> > >
> > > I have the following construct in AA:
> > >
> > >
> > > AFL codes
> > > ......
> > > ......
> > > porosityTags = Cross ( S1_curve, price );
> > > priceBelowSupportTags = IIf( 100*((price - S1_curve)/S1_curve)
> < -
> > > S1_porosityPct , 1 , 0 );
> > > ....
> > > ...
> > > ....
> > > ...
> > >
> > > AddColumn ( price , "price" , 1.2 );
> > > AddColumn ( S1_curve , "S1" , 1.2 );
> > >
> > > Filter = (StrLeft(Name(),1) != "^") AND EMA(V,50) >= 50000 AND
> (EMA
> > > (price,200) - price)/price > 0.3 AND ( price <= ( s1_curve +
> > > S1band ) AND price >= ( s1_curve - S1band ) ) ;
> > >
> > > My questions is:
> > >
> > > - Does the location of the FILTER statment important? I do not
> want
> > > to explore on indexes (symbol with ^ as the first character),
> Stocks
> > > must have average volume of more than 50000 shares a day etc.
> If I
> > > place the FILTER statement at the end; will AB still execute all
> AFL
> > > statements above but just not print out the result or Does AB
> skip
> > > the stock completely if the stock does not meet for example the
> > > average volume condition.
> > >
> > > - Can I have multiple FILTER statement?
> > >
> > > - One of the condition is 200 EMA volume. if Range was selected
> > > as "n last quotation" and "n=1". This setting seems only affect
> the
> > > Addcolumn statement but not the AB's EMA function, meaning it
> only
> > > print out the last met(filter) quote but the EMA(price,200) is
> still
> > > computed normally. Is this understanding correct.
> > >
> > > TIA
> > >
> > >
> > >
> > > Send BUG REPORTS to bugs@xxxx
> > > Send SUGGESTIONS to suggest@xxxx
> > > -----------------------------------------
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> > > (Web page: http://groups.yahoo.com/group/amiquote/messages/)
> > > --------------------------------------------
> > > Check group FAQ at:
> > http://groups.yahoo.com/group/amibroker/files/groupfaq.html
> > >
> > > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> > >
> > >
>
>
>
> Send BUG REPORTS to bugs@xxxxxxxxxxxxx
> Send SUGGESTIONS to suggest@xxxxxxxxxxxxx
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> Post AmiQuote-related messages ONLY to: amiquote@xxxxxxxxxxxxxxx
> (Web page: http://groups.yahoo.com/group/amiquote/messages/)
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>
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