Once again,
@Bad_Badness has offered good advise.
MFE/MAE are excellent metrics for helping design setup and trade plans.
Tips and/or gotchas...
MFE/MFA are PER TRADE metrics... You WANT maximum MFE and minimum, or 0 MAE.
Maximum MFE can be attained by exiting profitable trades while they are running.
For instance, a scalp trade where you "expect" 10 ticks with a limit order exit in place
will produce max MFE even if it continues for another 1000 ticks. This is where type/style of trade fits. As a scalp trade the job is done, and done perfectly according to plan!
But as a swing trade, did your system/plan get you back in? Did you second-guess? etc etc.
OTOH, MAE teaches about stops... there are 5 types of stops...
1) Chart structure stops.
2) Money only stops.
3) Time stops.
4) Catastrophe stops. Think circuit breakers and black swans...
Is this the trade that wipes you out? Or will you be able to trade again tomorrow?
5) Ad-hoc stops. Also known as "feel". This has potential to create very bad trading habits.
One other nicety of MAE, it teaches about "give back". Which includes BE.
I also want to mention paper trading.
I am from the camp that paper trading is best used for "how-to" use your platform.
Today, with all the micro, nano, onesie, and fractional instruments, there is no reason
NOT to have skin in the game. Further, as Ai pervades, the more you NEED to understand YOU and what YOU do.
It's like the TV show "Undercover Boss"...
It takes a human to see the human costs and stupidity of highlighted cells in a spreadsheet, and the effects of policies written with a Pilot G2 pen over a bagel and a shmear in the c-suite lounge.
Good trading to you.