This post and that of 5Pillars makes me think there's a question about what we mean by 'mechanical'. I guess I thought he meant 'fully automated', as in trade entry and exit are controlled by a computer, taking the human right out of the equation. You guys seem to be talking about mechanical systems but are talking about discretionary components within those systems. None of my entries are based on anything other than the output of my analysis algorithms (yes, Cheese, I know this gives you a (very) little woodie). I get the signals, which are mechanically generated, then make a discretionary decision as to whether to actually take the trade. I do not trade intra-day.