If this is a small stake that you want to be aggressive with, I would consider 5%. If you have a string of losses, you may want to pull back to 1-3% for awhile, or paper trade and reassess.I've got 1000 USD and a strategy that makes sense and has a good profit factor.
But how do I calculate best optimal fixed fraction % for it?
Clearly if I risk 1% or 2% per each trade, I am not going anywhere and equity is not utilized at its fullest potential...
on the other hand if I trade let's say risking 90% of equity on each trade, I am playing with fire and about to blow up my account, right?
So how do you calculate best MM FF% ?
What do you use for educated guess then?