I've seen stats mentioned about average profitable trades being 7 pips and losers being 37, and I believe these numbers help to validate this issue. The large average losers is probably due to MC's with multiple trades going negative and closing. As open, positive trades will never close automatically (e.g. no MC, unless there are more outstanding negative trades), these are only closed with limit orders, EA's or the trader. Therefore, the traders are potentially cutting off their profits far, far too soon. "Let your profits run" makes SENSE, but it seems like many find this hard to put into practice.
So, are traders closing trades too soon? There are fantastic examples of people supporting and discussing and agreeing with this behaviour all over this forum - "Make 5 pips a day", "All you need is 30 pips", "I make 2.5% per week and then stop trading..." and on it goes.
Why? Why stop the winners so quickly?
I think people need to get away from having expectations about R:R, TP limits, etc., as this is potentially capping many big, winning trades. What they need to do instead is accept a minor, potential win by bumping up the SL from BE into +5, +10, +15, etc. area when the trade is up 40, 60, 100 pips. Yes, you could 'lose' all your profits on a pullback, but so what? You couldn't know if it was going to come back to only +15, or go up another 300.
So, give it a try. It can't hurt you, as we all know you can't lose in forex by taking winning trades. But you need to let the winners be big winners sometimes (or fall back and just be a little ones).
*I will add that actually, getting in is much easier, but can still be a bit awkward, or at least it seems to be. That is, if a trade 'goes against the trader', it may be called a bad trade/bad entry. However, it wasn't necessarily bad (if all the indicators were reasonably positive), but it just happened that the market didn't move in a positive direction. Therefore, in hindsight, the trader might want to call it as being a 'bad entry', but it could also be overly tight SL, news, etc. and thus nothing to do with the entry and/or indicator.