Hello.
Is it possible to change the getBar() method behavior, for it to omit the weekend flat bars?
...maybe i need to apply Filter.WEEKENDS somewhere, but i couldnt find out how to do it...

thanks

Then you need to subscribe to a custom feed, e.g.:

   @Override
   public void onStart(IContext context) throws JFException {
      console = context.getConsole();
      IFeedDescriptor feedDescriptor = new TimePeriodAggregationFeedDescriptor(Instrument.EURUSD, Period.ONE_HOUR, OfferSide.ASK, Filter.WEEKENDS);
      context.subscribeToFeed(feedDescriptor, this);
   }

   @Override
   public void onFeedData(IFeedDescriptor feedDescriptor, ITimedData feedData) {
      console.getErr().println("IFeedListener.onFeedData: " + feedData);
      // if you want to retrieve concrete prices you need to use cast e.g.: ((IBar)feedData).getClose()
   }

Run the attached strategy in Historical Tester over the timespan that includes weekend to see that the onFeedData does not receive the weekend bars. Read more on feeds here:
https://www.dukascopy.com/wiki/#Chart_feeds