fear or emotional reactions

when i was a amateur it happened a lot
i could not manage my emotion and it could hurt my trades, i don't know why but at that time i felt like they are not necessary
after that i get to know about their importance and how they can stop me from opening a trade that i thought can be a profitable one (fear) and also how gear could jump me in a trade that i wasnt ready and did not analyze it
so you can master them all just by making your trading plan stornger