# Am I calculating my Kelly Criterion correctly?

I'm taking a look at my trading history over a particular time period and have 500 trades on with an win rate of 82%. My average win is $W$. My average loss is $L$. So am I correct in assuming the Kelly Criterion is:

$$\frac{0.82 \times (W / L + 1) - 1}{W / L}$$

$$f=\frac{pW-qL}{WL}=p/L-q/W$$
where $q=1-p$ and $p$ is the probability of a win.
When the wins and losses are random, with average $W$ and $L$ respectively, I am not sure this formula is completely justified. But it might be a good approximation
• But is it fair to use my existing track record to justify the p, W and L? – Shamoon Oct 17 '17 at 20:18