“Whenever I enter a position, I have a predetermined stop. That is the only way I can sleep. I know where I’m getting out before I get in. The position size on a trade is determined by the stop, and the stop is determined on a technical basis… I never think about [stop vulnerability], because the point about a technical barrier – and I’ve studied the technical aspects of the market for a long time – is that the market shouldn’t go there if you are right.”