Drawdown is a decline in the deposit from its peak value, expressed as a percentage. Unlike a single loss, drawdown shows the cumulative result of a series of trades and helps gauge how dangerous the current situation on the account has become — well before the deposit gets close to zero.
How drawdown is calculated
The formula is simple: drawdown = (peak balance − current balance) / peak balance × 100%. For example, if a deposit grew to $1,000 and then dropped to $800, the drawdown is 20%, even if the starting deposit was only $500. The peak value, not the starting deposit, is the key reference point.
Why drawdown grows non-linearly
Recovering from a drawdown is harder than it looks: if an account lost 50%, it needs to grow by 100%, not 50%, to return to its original value. This asymmetry is the main reason it is important to limit drawdown in advance rather than trying to "work off" a loss with bigger stakes.
| Drawdown | Growth needed to recover |
|---|---|
| 10% | 11% |
| 20% | 25% |
| 50% | 100% |
| 80% | 400% |
What drawdown level is considered critical
A commonly accepted benchmark is to cap maximum deposit drawdown at 15–20%. If the account reaches this level, it is wise to stop trading, analyze the causes of the losses in the trading journal, and return to the system only after a break, rather than trying to immediately win back the losses.
Daily and weekly drawdown limits
Besides an overall limit, it helps to set shorter thresholds — for example, stopping trading for the day at a 5% daily drawdown, or for the week at 10%. This protects against a situation where one bad session escalates into a series of emotional trades, covered in the article on trading discipline.
How drawdown relates to trade size
The larger the stake per trade, the faster a critical drawdown builds up during a losing streak. The calculation of an optimal trade size is covered in the article on how much of your deposit to risk per trade — this parameter determines how quickly an account can approach the drawdown limit.
How to recover after a drawdown
After hitting the drawdown limit, the right approach is not to increase the stake "to compensate" but to return to a standard 1–2% risk and rebuild the deposit gradually. Increased stakes after a drawdown statistically raise, rather than lower, the risk of losing the entire capital.
Tracking drawdown in practice
Tracking drawdown doesn't require special software — a simple spreadsheet with the account balance logged after every trading session is enough to spot the peak value and calculate the current percentage decline from it. What matters is checking the number regularly, ideally after every session, rather than only noticing a drawdown once it already feels uncomfortable.
Drawdown as an early warning, not just a stop signal
A rising drawdown is also useful as an early warning before it reaches the hard limit: if the account moves from a 5% to a 12% drawdown within a few days, that pace itself is a signal to review recent trades for rule violations, even if the 15–20% ceiling hasn't been hit yet. Waiting for the hard limit alone often means reacting only after the damage is already significant.
Conclusion
Calculating acceptable drawdown turns a vague "don't lose too much" into a specific, measurable limit that is easy to monitor. Capping drawdown at 15–20% along with daily limits protects the deposit from emotional decisions during a losing streak and preserves capital for long-term trading.