https://bettingsystemsguide.com/els-calculator-estimated-losing-sequence/

I have created a free ELS calculator that works in Excel. You can download it from my site.

We can use the win rate of a strategy to calculate its expected longest losing sequence. This is the number of consecutive losing bets in a row. In a long losing streak, we can expect 2 or 3 of these ELSs to come within a short space of time.

We can take this ELS figure and multiple it by x4 to get an expected maximum drawdown, and from that figure we can calculate a conservative betting bank figure (bankroll) needed for this strategy.

Download the Excel file and enter your data in the yellow cells. If you have the actual maximum drawdown figure, then you can get an idea of how volatile this strategy is compared to other strategies. I use a MDD/ELS ratio for this.