http://quantifiableedges.blogspot.com/2009/01/stops-part-1-when-not-to-use-them.html
"I’ve gone through numerous other exercises and found the same thing time and again. When looking to trade overbought/oversold techniques, stops generally don’t work well. If the system suggests the security should bounce when it drops to $20 and it continues to $18 then it is REALLY overdue for a bounce. Any level of stop ensures you are selling an extremely oversold security that is making a low. Those are buying conditions for oversold systems – not selling conditions.
One stop technique for oversold systems that I will sometimes use that in testing hurt performance less than the other techniques I evaluated is this:
Wait until the security bounces for a bar or two. Look for a higher high, higher low, and higher close – or at least 2 of those 3. Then place a stop under the swing low that was just made. In cases like this even if the security doesn’t hit your target exit price, it still ensures that you won’t have to suffer through the entire next leg down. While it seems logical and can sometimes help avoid catastrophic trades in the long run you’re normally better off just waiting for the mean reversion to occur and exiting at your target level."
