I eventually hit on a solution for this... I have two accounts, one I live off and the other I compound with. They do the same trades more or less, apart from rounding errors... hoever the compounding account is about a month away from overtaking the living off account at which point it'll start increasing size. I don't really do enough size in either tbh.
I have 3 limits that I have to keep the live off account on before withdrawing money: a hard limit, another limit where I'm on a lower profit split below, and a self imposed limit which is higher than that (roughly a pretty bad fortnight away).
