Quote from Buy1Sell2:
Bingo! You have made part of the case for why scaling out is an inferior and scaredy cat strat. This stategy is an emotional crutch used by overleveraged traders who are simply anxious to get back to a position size that they can live with emotionally. It's better to start with the correct position size from the beginning.
http://www.elitetrader.com/vb/showthread.php?s=&threadid=78975&highlight=scaling
If you say that trading should be void of emotions, I agree, however in reality, emotions will always play a role for most traders. (most beginning traders also)
I am not talking about just scaling out, I'm talking about both scaling in- and out.
Scaling out at itself is a great thing, seeing as traders not only get their judgement of whether to stay in a trade clouded by emotion but also by their inability of clairvoyance. You might say then not to take a trade, but I am talking about scaling-in and out not only for higher probability trades, but also for higher risk lower probability trades. It is a tool that is very useful for people who notice that not every trade has the same equal probability. If you take only 100% trades, you will get far less trades to take, maybe once a week. For that, scaling in and out probably wouldn't be too useful.
Program traders don't have this problem. They buy and sell, short and cover, but each trade has the same (average) probability.
For me personally, I view scaling in and out as a valuable tool.
I believe you're talking about a different thing, you're talking about traders who go all-in on a trade, then "scale-out" of it because they're scared of taking a loss. In case they have a too big of a position, It is indeed prudent risk management. However getting in a too big position at the start isn't part of good risk management. I'm taking about scaling- in and out as part of a complete risk management plan for every trade. I believe that's why we seem to differ in our opinion on this subject, we are talking about two different things.