Maximum Drawdown

Understanding Maximum Drawdown

Maximum drawdown (MDD) captures the biggest drop your account has suffered from any peak to the subsequent lowest point. If your account went from $20,000 to $14,000 at its worst point before recovering, your maximum drawdown is $6,000 or 30%. This single number tells you the worst period your strategy has ever gone through.

MDD is different from a simple losing streak. It includes all losses, partial recoveries, and further losses between the peak and the trough. A series of small losses punctuated by minor wins that never reach the previous high can produce a large maximum drawdown even if no single trade was catastrophic.

How Professionals Use MDD

Prop trading firms, hedge funds, and signal providers all report maximum Drawdown as a headline risk metric. A strategy returning 40% annually with a 50% MDD is far less attractive than one returning 25% with a 10% MDD. The ratio of annual return to maximum drawdown, sometimes called the Calmar ratio, helps compare strategies on a risk-adjusted basis.

Reducing Your Maximum Drawdown

Keep risk per trade between 0.5% and 2% of your account using proper Position Sizing. Diversify across uncorrelated pairs to avoid having all positions move against you simultaneously. Set hard daily and weekly loss limits: if you hit 3% in a day, stop trading. Review your strategy's historical MDD in backtesting before going live, and add a buffer because live trading almost always produces deeper drawdowns than backtests suggest.