Be careful with prop firms. Many of them just want to pocket your 150 Euro. Try these two ET sponsors: https://www.topsteptrader.com/learn-how/ https://lmitrade.com/
It is if you're an experienced (professional) trader and trade according to a predetermined formula. I tend to write a lot of formulas (ideas) and want to try them out - at least those that can be proficiently written up. Many of my formulas require to be entered via a stop order because the market moves so quickly (namely NQ) and exited via limit orders. I usually do this ahead of time, and occasionally my stop entry order and my limit exit order are hit within seconds in a sizable move.
I'm talking about psychology. Losing 50% of your account is never the same as losing 50% of a demo account. Professionalism is irrelevant.
Possibly I'm too old now and lost the connection between trading and emotions. My daily swings are in the $1k's but when I trade a day later or a week later after a loss I seem to follow the same trading strategy I'm currently using.