now this is where i disagree with some- so day one i would start off using about 3%-5% of my margin account for my daily value at risk. but as soon as i make profits of say 20% on my account over a few lucky days, now i view that 20% as my "gambling roll" and try to run with it- if you can have 3 good months in a row then stop continuing to level up, but start taking out withdrawals, then 1 mo's pay should easily be several initial deposits, so if you ever do bust, just go back to the beginning and start over. i'm currently starting month 4- a very key one for me on this run, and i'm hoping to just maintain my current size, but get paid for the next few months. btw if you don't view it as a completely losable "gambling roll" this won't work, and currently i'm gambling with 15% of my roll / day, but had 100% return in june, 60% july and 150% augusts.