Is there really a profitable automated trading system / bot? I mean with a proven >5% return of 1-2+ years. If yes, then why havent all the wallstreet firms with their billions of dollars using it? I am a senior system developer (j2ee, database, etc..) professionally and have spent quite a bit of time researching/creating poker bots but at the end i realized it's just not possible to create a good bot in any game that is heavily dependent on human emotions. I would imagine a trading bot is much more difficult as the cominbation is almost infinite.