What kind of stop was he using? A wide stop and small target can produce impressive win percentages but not much in the way of profits. I found systems that took one point profits almost always ended up as losers. The IB commish is like 8% of a one point profit, and of course you pay it on losses too. That's a tough burden to overcome. Of course, this guy was letting some of the trade run for a bit. It would be interesting to see some accurate backtesting of it.