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[amibroker] FILTER questions.



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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


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