Well, my point was really pointed towards plays that I've finished holding, and the lure to get back into them right away either to pick up a loss or to get another win with them. And that I want to keep remembering, that once I'm out of it, I'm out of it, and more than likely the reason I got in, doesn't exist anymore. It may exist again soon, or may never exist again at all, but that its better to move on to the next one.
But otherwise, Yes, if there's a non-performer, that doesn't fit the reason you entered, or the time frame, etc., then give that sucker the boot.
These thoughts are just mine, not right, not wrong, just thoughts. Invest in what you believe in, not what I believe in. Do your research, and invest in the facts.