I'm not sure about the "stick to making money" part. He's made money in half of one year and lost money for 11 years. In other words, he's been profitable less than 5% of the time. Who's to say he's not just enjoying a "fooled by randomness" period where his performance is mean reverting a bit? That's a more likely explanation than "now I've turned the corner and will be forever profitable."
Could be that he finally found a system that is working for him or he's finally developed enough discipline to stick to his system. Trading systems do take a long time to develop and perfect to the point of being consistently profitable because the market is so dynamic and changes all the time. Sometimes you develop something and then the market completely changed on you and you have to go back to the drawing board and completely revamp what you came up with and start anew. Happened to me many times during my trading career.
