This is very easy to get wrong.  The good news is, once you have a good number in place, you can set it and forget it.  Having the right leverage is also a great way to figure out if you're over-trading or putting too much money on a single trade.  In Episode 8, VP gives you two options.

Blog for Episode 8 - http://nononsenseforex.com/forex-q-and-a-podcast/best-leverage-in-forex/

ESMA Ruling - https://www.esma.europa.eu/press-news/esma-news/esma-agrees-prohibit-binary-options-and-restrict-cfds-protect-retail-investors

Screenshot of my Metals Account - https://imgur.com/ITBUdiO

ATR Video - https://youtu.be/086ozcHDZPw

Money Management Video - https://youtu.be/aEORce6dZZI

Dirty Dozen Video - https://youtu.be/3c6o4O8goAo