Was wondering if any of you do any probability testing on price series before running actual trade testing on the price data. For instance stationarity or dependency models, or any other probability tests. I've been reading more and more about this and am wondering how much more of a grasp on the vehicle your trading it gives you. For instance, would you be able to make decisions about the strategy you're designing based on the results you find? Or is it just semi-redudant... based on the premise that: if there are other people who have designed systems and are making money then I should be, too. I guess that could also be called the semi-lazy way, too. Any thoughts?