I am interested in seeing how different traders use position sizing as part of their edge. The poll is open ... please weigh in. Thanks. I guess I do a little of all the options listed, but I mostly adjust size with discretion. For instance I'll size up going the other way after a failed b/o, or when I feel the odds are heavily in my favor for any of various reasons. The key is to not get so big that you can't handle stringing a few losses together with the larger size, because you'll need that larger size on when you finally catch the winner. I also will average down on certain setups, more often with the indices than with commodities.