Quote from trader_david:
averaging down is not suitable for future since there is time term related to future.
in most times, it is ok to do averaging down if you limit your risk to your planned level. but if you did not plan it, often you end up caught, and you are broken. why? first you suppose " the market will finally go in your expected direction", that is flawed, for example, you found American Home Morgage (AHM), is in the biggest drop, you bought, then it continued its drop and you bought it again to lower your entry price, keep doing that since you figured out that " the company will finally turn around", but you wrong, AHM filed chapter 11, you broken! second psycholgically, it will become a habit, when you are caught, you ego will force you to fight back with the market, the deeper you are caught, the more likely you will be sturbborn to keep your holding even add more, until last hope gets lost since you figure there is no way you can get out of the hole!