Quote from Laissez Faire:
Why is it so scary to buy support?
Testing prior resistance at the opening range high, now support, was such a beautiful long entry.
It's the hardest thing in the world for me to do. In my case, I think it's because "it's gone too far" ... and we fail to think in probabilities; what's more likely here-- in every case in a trend, by definition of a trend, it's that the bulls will keep buying until sellers really show something outstanding, and vice versa. But in my case, "it's gone too far." One day soon I am going to snap out of this, because I get pissed at seeing so much easy money in one direction, while I'm scraping for nickels in the other direction.

That is of course that you are trying to add to a long or get in from flat..