My
money management rules were as follows: (1) Never risk more than half as much as the
reasonable potential reward (e.g., don't risk more than 10 pips if your
reasonable take profit point is less than 20 pips), and (2) never risk on any one trade an
amount that would draw down your total trading capital by more than 10 % (that's my «make sure you don't blow out your account» rule — I'm
fairly confident
of my ability to avoid putting on 10 losing trades in a row, trading as I do as a scalper and short term swing trader).