Drawdown recovery maths: why a 50 percent loss needs a 100 percent gain

[Amanhasnoname]

Losses are asymmetric. Losing 10 percent needs an 11 percent gain to recover. Losing 50 percent needs 100 percent. Losing 80 percent needs 400 percent.

The numbers explain why risk control matters more than return chasing. A scalper that risks 5 percent per trade can hit 30 percent drawdown in a bad week, and the climb back takes far longer than the fall.

It also explains why position sizing rules often cap risk per trade at 0.5 to 1 percent. A string of ten losses then costs 5 to 10 percent, which is recoverable.

High win rate systems can hide the problem until a bad run. Leverage amplifies it.

A practical approach is to set a maximum acceptable drawdown, say 15 percent, and work backwards to a risk per trade that keeps the worst plausible losing streak within that limit.

Simulation helps with this too. Using the strategy's statistics, find the risk level at which the chance of exceeding the drawdown limit is small.

A related number worth tracking is time under water, meaning how long the account stays below its previous peak. Two systems with the same maximum drawdown can feel completely different if one recovers in a week and the other needs three months.

What drawdown limit have you set, and how did you choose your risk per trade?