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[amibroker] Missing data



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Tomasz, 
I noticed that the 
EXAMPLE
/* note: if given watch list contains lots of symbols 
** performance may be poor 
*/ 
function CreateAverageForWatchList( listnum ) 
{ 
   // retrive comma-separated list of symbols in watch list 
   list = CategoryGetSymbols( categoryWatchlist, listnum ); 
   Average = 0; // just in case there are no watch list members 
   for( i = 0; ( sym = StrExtract( list, i ) ) != ""; i++ ) 
   { 
      f = Foreign( sym, "C" ); 
      if( i == 0 ) Average = f; 
      else Average = Average + f; 
   } 
   return Average / i; // divide by number of components 
} 
Plot( CreateAverageForWatchList( 6 ), "Avg of WL 1", colorGreen ); 

does not give accurate results when some members of the WL have 
missing data.
Is it possible to have the same results with

AddToComposite(C,"~c","C");
AddToComposite(1,"~count6","v");
Buy=0;
Plot(Foreign("~c","C")/Foreign("~count6","V"),"Average",4,8);

For the new year I wish Sales2004>=Sum(Sales,5) in yearly basis.
[one year later let us know if my wish will be true !!]
Dimitris Tsokakis


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