General Biggest lesson is to have a system where you can sell

[Huzifa]

Personal experience, I sold EUR/USD as a beginner around March or April last year. As you know it has the longest bull run after being new I was determined not to sell at a loss. Was doing quick trades with pennies as profits and no loses. Held on to the trade from 1.12 to 1.2. lesson learnt the hard way to have a system where you can sell at a loss regardless of how bad you don't want to if you're following your system and firmly believe in it's fundamental value. So the system needs to come from you not since system you saw on YouTube and didn't really internalize.