Hello TonePot,
This a good question. For me, trade management (knowing when to exit at trade) is the most challenging task once trade is enter. For example today, took a CL position and exit for 10 ticks as I believe price was about to turn in opposite direction, but I made slight mistake and didn't realize a support level near my exit and CL proceeded to nearly 90 more ticks. That hurts.
For me, I am learning that I can assume a profit target, but I should not respect that profit target until price touches the profit target and I monitor price behavior around this area. Ideally, I want to hold a position as long as I can until I have some evidence or belief price is about to go in opposite direction.
I want to be a more thoughtful trader and not just exit some profit target, but let price get to that profit target and management it.
Ideally, when I exit a trade, my expectations is for price to go the other way, then I know I made a good trade. I use to think in terms of every trade I need R:R greater then 1. But lately, I want to have a better reason for exiting a trade. I want the chart to tell me "you are long and price may be turning, get out of the position".
If I exit a trade a profit target, and price continues pass this price target, I will not be to be happy. I want extract as much profit as I can and that is my goal.