That was for me the biggest problem to overcome. Be confident and control your emotions when your system tells you to do something that is opposite to what most people do. Because you do what 90% of the people don't do, you probably belong to the 10% who win.
It is like driving a car only based on GPS and with no possibilitie to see where you are driving. Just trust the GPS and everything will be fine. And then the question pops up: What if the GPS makes a mistake? The answer is: just trust the GPS.
But believe me it is sometimes very difficult to take position when almost everybody is in the opposite direction or has no clue what to do. Trust your system.
Depends in large part on how thoroughly one has tested his system, or strategy. I don't know who you used to be, but I read your posts, and it seems pretty clear that you've paid some dues. And if one stays around long enough and isn't a complete dunce (and doesn't go broke), he has to pick up at least some of the important elements of trading. If he's also studied and done at least some testing, as you appear to have done, then trading one's system, even if it seems counter-intuitive, becomes much easier.

