[amibroker] Exploring Defined watchlist problem with proshare ETF

["Marty J" <prog200@xxxxxxxxx>]

I have a watchlist called "Ultra Commodity Short" with the following stocks in it:
UCD,UCO,UGL,AGQ

When running the simple explore formula with the "use filter" Define to this watchlist there are no results shown. All stock are above $1

Filter = C > 1;

AddColumn( C, "Close", 1.2);


If I select "current symbol" and the symbol is UCD and run explore the results show:
UCD 12/30/2009 28.4
 
This happens to all proshares ETF stocks. 

If I add BA to the watch list and set the user filter Define and then rerun explore the results shows:  
BA  12/30/2009 54.96

If I add any of the proshare etf stocks into any other watchlist they still do not appear when running explore against that watchlist. 

Any Idea why this is happening to only the proshares ETF stocks?

Thanks

Marty



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