Friendly advice. I test my triggers in time scales and progress further if they become promising. I test all triggers over 3 days data / 2 weeks / 1 month / finally 3months data. If your triggers are withstanding 3 months of play data then youre on to a winner, because this means that if you wanted to play say 200 games, you could drop in at any point in the game and know your going to come out profit up.
I have a feeling it boils down to some factors. xfeeder in itself is a great program for testing out your thoughts and ideas.
*The betfair game is random (It has to be, or people will discover trends). You get ups and downs over periods of time, a strategy that works today may not work tomorrow unless you have a means of handling the swings that occur*
If you have a big £4000+ betfair bankroll, then a lot of triggers will easily cope and give you consistant profit. The hard part (and part of the enjoyable factor) is discovering something that can cope with loss swings when your bankroll is lower, say £500+ starting point... i say hard, but not impossable. xfeeder then becomes a very good money earner.