I've always found it hard to answer questions like:
How much bankroll do I actually need for the risk I'm comfortable taking?
What's a realistic range of outcomes over the next year?
How bad could the drawdowns get?
What's the probability that I actually reach my bankroll goal?
How much does my win rate / variance / volume change the picture?
So I built Poker Bankroll Risk Engine to answer those questions with actual simulations rather than just a generic bankroll rule.
