[amibroker] Please help with Premarket Volume analysis

["gunovanengel" <gunovanengel@xxxxxx>]

Hi Guys,

Need help with a premarket volume analysis.
I would like to write an afl that will only total the premarket 
volume. The code I have so far does not work. Any suggestions?

Regards
Guno
==================== Code ==================================

PreMarket         = TimeNum() >= 80000 AND TimeNum() <= 92500;

TimeFrameSet(in1Minute );

PreMarketVolume = 0;
 if(LastValue(PreMarket))
   do
   { 
      PreMarketVolume = PreMarketVolume + Volume;   
   } while( (BarsSince(timenum() == 80000) > 0);

TimeFrameRestore();
PreMarketVolume = TimeFrameExpand( PreMarketVolume ,in1Minute); 








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