I will be taking 20% of account to use for high risk with the aim of compunding (I may as well put my signature to use).

My account has 100:1 leverage and if I have worked it out correctly then to get a margin call at the point my SL is hit is given by:

SL/(100 + SL) SL = stop loss in pips.

So with a 25pip SL the most I can risk is 20%, with SL = 100pips it would be 50%, but using SL = 25pips, 100pip gain is 80% account and 50% acount growth with 100 pip SL.

Kelly's number gives the % to risk for optimal growth if you know the probabilities of win, loss, or breakeven:

Fraction to bet F = (R*W-L)/R(W+L)

average growth per trade y = [(1+FR)^W]*[(1-f)^L]

Account growth after N trades = y^N

R = Reward (as in 1:3 etc)

W = probability of win

L = probability of loss

Alternatively if you are going to risk a certain fraction, its easy to calculate the minimum W needed.

So if your W = 55%, L=45% then for R = 1, F = 10% and average trade makes 1.005 gain.