Quote from Buy1Sell2:
What you have described with the composite signal are 3 separate trades that do not get scaled out. What I am not in favor of is taking half a position off at 1 pt in the case of trade A when the target is 2 pts. Your example is not an example of scaling out, rather it is a description of 3 different setups/trades. Using your info by the way, one would be able to calculate which setup would be the optimal setup and then all contracts deployed could be used on that setup only over the long haul.
For most traders, entries and exits are developed over a long period of time, thus it is very hard for them to think of their approaches in a 3rd person, objective point of view. So scaling out to them is just a term to describe how the trades are carried out.
Using scale out on a trade for many traders, is the way to become a profitable trader. However, as you pointed out, if the scale out is done out of necessities to feel good about the trade, scaling out would not help them in the long run.
Many who posted here with their live calls do scale out at various target zones, that to me is taking advantage of the probability at various profit targets, just like a composite signals. That will work over the long run, as the trades are done in a fashion similar to the a,b,c combination I was talking about.
For those who can only afford to trade a single lot, it is best to trade a single signal, or a group of signals that are of similar risk/reward profile. That way it is much easier to deal with in terms of trade management.