Philosophically!!! This is the question that you have to come to self realization.
You will always not be happy when you sell!
You will always be wrong when you sell: this is your thinking.
- You sell with a profit but price go higher so you think you are wrong.
- You sell at a loss but the price bounce back so you think you are wrong.
- You sell at a profit when price drop you still think you are wrong because you should sell at the very top.
Set your goal for a time period
So it would make more sense to set a goal for a time period and when you reach the goal celebrate and set the next goal.
Don’t bother if you are right or wrong, as long as the 2 steps back are less than 1 big step forward to reach your goal. This is just a game.