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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/)
> > --------------------------------------------
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> >
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http://docs.yahoo.com/info/terms/
> >
> >
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