Essentially, a trade which is originally 1:1 reward/risk can be transformed into something like 2:1 by tightening the stops, perhaps with either the passage of time and /or the position moving in your favour.
Bone, i know you are a vendor, but can you say anything on adding to positions?
I so much appreciate doing something more constructive than getting ripped by trolls - so thanks for the welcome diversion.
Now, keep in mind that my answer is predicated on the fact that we are swing trading spreads - and this might or might not be the best answer for those trading a flat price futures contract. So,
1. We find that tightening up stops past 1:1 R/R usually invites getting taken out too early. Markets are always correcting and consolidating before they either continue their trend or fail off. The best approach IMHO for any trading style is to carefully consider your market's recent trading range - for example, the past 20 period ATR, before setting your stop. You want to avoid what has been "typical" market trading action taking you out of a trade that eventually performs.
2. Adding to winners is fine but adding to positions that are marking against you will eventually destroy you one day.
3. I personally will scale out of a winner that I have added to, but in terms of taking a loss I will vomit all at once if liquidity is there.