General question for intraday automated traders.. no manual intervention except in extreme cases. In your opinion, Is 1% a day return on average possible with 4:1 buying power? This is after accounting for commissions but excluding things like colo fees, exchange fees, etc. Backtesting my stuff is showing really good results even after conservatively accounting for commissions, spreads, slippage, etc. My out of sample tests sometimes performs even better than the in-sample data I trained my models with.. Basically, I think my results are too good to be true.. have you ever tried something and thought the same, and then have it turn out to really be true, or in most cases has it really been too good to be true? I'm always fully hedged (according to historical optimal hedge ratios) and always place hard stop-loss orders immediately upon entering the position so I don't think the results are skewed to some long-market bias.. I really have my doubts whether 1% a day is really possible.. this would mean 250% a year and really good fund managers are lucky to even beat the market.. do you know anyone making this kind of money?