Scaling out is inferior behavior. When we have a winner, it makes more sense to let it ride. Will that cause us to give back profits sometimes? Yes. However, it will keep you in the really big winners and more than offsets the savings by scaling out. --The reason folks scale out is many times due to the fact that they took a larger position than they were comfortable with initially. In effect, they were wildly overextended. The scale out feature simply gets them back to where the total position is now of a more correct size for their account size and comfort level. In summary, they were scared when the original position was on and now have been lucky enough to get some profits and feel they can let the rest run. What happens though when the initial trade goes against? --Sometimes they let the whole trade run as losses mount. -No, it's better to size correctly and let it run to where you can exit at a time of your own choosing (borrowed line from George Bush). No sense being a weak hand.