Hi, Personal small profile to let focus needs: I am a (relatively new) scale and spread trader in Ag Commodities, I am beginning to look at livestocks, I do not like financials futures, I fear energy which I take myself away from. Math is not a problem, linear regression is a friend. Finally, the question. From a strategic point of view, I feel I am still weak in Position Sizing. It doesn't automatically mean I am strong in entering-exiting trades, but so far I feel more comfortable in. Search in the forum did not succed, so I am to ask if there is a good text about postion sizing management, other than Van Tharp's ones, to start from. Thanks, Regards.