I don't mean to knock a trading system that made money but to test a system thorough you need to test it in a bull trend and then a sideways trend and then a bear trend to check its effectiveness. EX: I've known traders that kill the market in bull trends as they play big and often but with the trend in a solid uptrend they can't help but make big money with those odds of consistent up markets. Those same people get absolutely killed when the bear market comes as it is the same thing on the downside. This is always a shock to them an others that follow them. Seen it so many times over several decades. And in choppy markets they just get chopped up and go nowhere hopefully as it is a random market. So it would be wise to take this person's work and run it through the markets from 2007-2008 right through the selloff into the low in March/09 to see how it fared. It may work in all markets but it will need tweaking for sure regardless. That tweaking or use in only one type of market is critical to know 'ahead of time"..................