Been there, that I can attest.
I have overcome by simply preplanning the exit right after or before the buy. I know it has been said by others, but it does work. Marry a human, not a stock.
At there very least a portion of holdings to break even.
Several defunct tickers I am even, but still hold to offset gains....that can equal a profit too long run.
I set it and forget it.
It is hard, I know with..."what if", but have a plan for "what if not". Ya know? lol
Sure sometimes the boat will sail by or sink, but having a life raft, I can still catch the next boat. Haha
I seem to get a better ratio trades that worked vs. not doing that and I am certainly not an expert in trading, just disciplined.
Regards,
Fizzlegig