Ok, it's a really good trading day. Smooth curves, no chop, high volatility, lengthy trends. You are up 3% on your trading acct, just today, hitting 100% on all your trades. 11:30 et hits and you take your lunch break, normally returning at 2:00pm et. Do you: 1. Quit for the day. That's enough. Be happy with what you got and don't get greedy. Feel good about your trading and enjoy the day. Mountains, beach, here I come. 2. Keep trading during the pm session at regular position sizes. If it is a good trending/trading day, tomorrow may be flat chop slop. Take the good signals when they are available. Your system expectancy does not care how you feel. Just trade the system. If you have recorded and analyzed your trades, you know by now that you do best by just following the system. Have faith in your research and follow it. If you don't, why trade? 3. Granted, (2.) has its points, but still, a human is trading the system. I'd rather just stick to some high probability, high r/r signals with 1/4 or 1/2 size positions. Then I am quite likely to add another 1% to my day, but if I don't, I still get to keep my 2% for the day without giving it all back. This seems like the best of both worlds, even though I know that I am perhaps weakening the performance of the system. Minimizing psychological damage is part of the overall system goals, and I need weigh this factor in as well.