Drawdown Explained: How to Measure and Limit Trading Losses

Drawdown is the decline in a trading account or strategy from a previous peak to a subsequent low. If equity rises to $10,000 and then falls to $8,500, the drawdown is $1,500, or 15%. It remains an active drawdown until equity reaches a new high above $10,000.

Traders use drawdown to understand the depth and duration of losses, compare strategies and decide when risk should be reduced. Unlike a single losing trade, drawdown captures the combined effect of a losing period. It can include closed losses, floating losses, fees and other changes reflected in account equity.

How to calculate drawdown

The basic percentage formula is:

Drawdown percentage = (peak value − current or lowest value) ÷ peak value × 100

Consider a hypothetical account that follows this path:

• Starting equity: $8,000
• New equity peak: $10,000
• Equity after several losses: $8,500
• Later equity: $10,200

The decline from $10,000 to $8,500 is $1,500. Dividing $1,500 by the $10,000 peak gives a 15% drawdown. When equity reaches $10,200, the old drawdown has recovered and a new peak is established.

The $8,000 starting value is not used for this particular calculation because the relevant peak was $10,000. Drawdown is always measured against the applicable high-water mark, not automatically against the first deposit.

Balance drawdown and equity drawdown are different

Balance drawdown

Account balance normally changes when trades are closed, deposits or withdrawals are processed, or account charges are posted. Balance drawdown therefore focuses mainly on realised results.

Suppose an account has a $10,000 balance and an open trade is losing $1,200. If the trade remains open, the displayed balance may still be $10,000. Looking only at balance would suggest there is no drawdown yet.

Equity drawdown

Equity includes the unrealised profit or loss on open positions. In the same example, equity would be approximately $8,800 before considering any additional charges or credits. The account therefore has a 12% floating equity drawdown even though its balance has not changed.

For active trading, equity drawdown usually provides the more complete risk picture. A large floating loss does not become harmless merely because the position has not been closed. It may continue growing, reduce available margin or eventually become a realised loss.

Common drawdown measurements

Current drawdown

Current drawdown measures how far the account is below its latest equity peak right now. If the latest peak was $12,000 and current equity is $11,400, current drawdown is 5%.

Maximum drawdown

Maximum drawdown is the largest peak-to-trough decline recorded during a selected period. If a strategy experienced declines of 4%, 9% and 7%, its maximum drawdown for that period was 9%.

This number needs context. Maximum drawdown calculated from one month of results is not directly comparable with a figure based on five years. A historical maximum is also not a guaranteed worst-case limit. Future losses can exceed anything shown in a backtest or previous live record.

Absolute drawdown

The term absolute drawdown is not used consistently across all platforms and reports. It may describe the fall below the initial deposit, or it may be shown as the monetary size of a decline rather than a percentage. Traders should read the platform's definition instead of relying on the label alone.

Drawdown duration

Depth is only one part of the experience. Drawdown duration measures how long the account remains below a prior peak. A 6% decline recovered in two weeks is different from a 6% decline that remains unrecovered for nine months.

Long drawdowns can create psychological pressure, tie up capital and indicate that market conditions no longer suit the strategy. Record both the maximum percentage decline and the time needed to recover.

Why deposits and withdrawals can distort the calculation

Cash flows should be separated from trading performance. If a trader deposits an additional $5,000, the account may appear to make a new equity high even though the strategy earned nothing. A withdrawal can make the account look as if it suffered a loss.

For a personal risk dashboard, maintain a record of deposits and withdrawals and calculate performance on an adjusted basis. When evaluating software or a trading method, confirm whether reported drawdown is based on balance, equity, closed trades or cash-flow-adjusted returns.

Why larger drawdowns are harder to recover

A loss and its required recovery are not symmetrical because the recovery begins from a smaller capital base. The formula for the gain required after a drawdown is:

Required recovery = drawdown ÷ (1 − drawdown)

Express the drawdown as a decimal in the formula. The approximate recovery requirements are:

• 10% drawdown: an 11.1% gain is required to return to the previous peak.
• 20% drawdown: a 25% gain is required.
• 30% drawdown: a 42.9% gain is required.
• 50% drawdown: a 100% gain is required.

For example, a 20% decline takes $10,000 down to $8,000. Earning 20% on $8,000 adds only $1,600, leaving the account at $9,600. A 25% gain is needed to recover the full $2,000.

These figures are mathematical break-even points, not suggested profit targets. Trying to recover quickly by increasing risk can deepen the drawdown instead.

How to set a sensible drawdown limit

There is no universal percentage suitable for every trader. A limit should reflect available risk capital, strategy behaviour, trading frequency, market exposure and personal tolerance for loss. It should also be decided before a losing streak begins.

A practical drawdown policy can have several levels:

1. Warning level: review trades, execution quality and exposure when drawdown reaches a predefined threshold.
2. Risk-reduction level: reduce position size, remove overlapping exposure or stop adding new positions.
3. Hard-stop level: pause trading and investigate rather than continuing automatically.

For a purely hypothetical example, a trader might review a strategy at 5% equity drawdown, reduce new position risk at 7% and pause it at 10%. These numbers are examples only. They are not suitable limits for every account or strategy.

Practical methods to limit drawdown

Risk only a controlled amount per trade

Define the maximum planned loss before opening a position. If a hypothetical $10,000 account risks 1% per trade, the intended loss at the protective exit is $100, excluding the possibility of slippage and gaps.

Position size must be calculated from the distance between the entry and exit level. A wider protective exit generally requires a smaller position to keep monetary risk unchanged. Using the same lot size for every setup can produce inconsistent risk.

Set portfolio-level loss limits

Per-trade controls are not enough when several positions are open. Five trades risking 1% each can expose the account to much more than 1%, particularly when the markets move together.

Set limits for total open risk, daily loss, weekly loss and strategy-level drawdown. A daily stop can prevent frustration or rapid market conditions from turning a difficult session into a much larger account decline.

Account for correlated positions

Positions in related currency pairs, metals or equity instruments may respond to the same event. They can look diversified while effectively representing one large directional trade.

Group positions by common risk factor and check the combined downside. Reducing duplicated exposure can limit drawdown without requiring every individual setup to be removed.

Avoid increasing size to chase losses

Automatically increasing position size after a loss can make the next loss disproportionately damaging. This is especially dangerous when there is no fixed maximum size, loss limit or independent reason for the larger position.

Keep sizing rules consistent. If drawdown crosses a warning threshold, reducing size is generally more aligned with capital preservation than trying to force a fast recovery.

Test unfavourable conditions

Backtests should include transaction costs and realistic execution assumptions. Stress testing can examine what happens if spreads widen, orders slip, several trades lose consecutively or a connection is interrupted.

Historical testing cannot predict the worst future drawdown. It can, however, reveal whether a strategy is already too aggressive under ordinary adverse assumptions.

Monitor automated strategies at the equity level

An algorithm may follow its rules correctly while producing losses because market behaviour has changed. Monitor live equity drawdown, open exposure, rejected orders, trading costs and differences between expected and actual execution.

Finoways builds algorithmic trading software and research tools for FOREX, COMEX and US markets, but users continue to trade through their own brokerage accounts and remain responsible for risk decisions. The scope of its tools is outlined on the Finoways services page.

How to maintain a useful drawdown record

A basic trading journal should record more than the final account balance. At regular intervals, capture:

• Balance and equity
• Previous equity peak
• Current drawdown in money and percentage
• Maximum drawdown for the selected period
• Drawdown start and recovery dates
• Total open risk and related positions
• Deposits, withdrawals, fees and financing costs
• Any rule changes made during the period

Review the record consistently, such as after each trading day or week. Changing the measurement method during a difficult period can hide risk. For market context, traders can also consult daily market analysis, while remembering that analysis cannot remove uncertainty.

Questions to ask when comparing strategy drawdowns

A drawdown figure is meaningful only when its calculation is transparent. Before relying on it, ask:

• Is it based on balance or mark-to-market equity?
• What dates and market conditions does the record cover?
• Were fees, spreads, financing and slippage included?
• Were deposits and withdrawals adjusted for?
• Is the result from a backtest, simulated account or live trading?
• How long did the deepest drawdown last?
• Were multiple positions and correlated exposure included?

A low historical drawdown does not prove that a strategy is safe. Short testing periods, unrealistically smooth prices or omitted floating losses can understate the decline a trader might experience.

Drawdown should trigger a process, not panic

Some drawdown is unavoidable in trading because no strategy wins on every position. The objective is not to eliminate every decline. It is to keep potential losses within limits that allow rational review and protect the account from severe damage.

When a limit is reached, follow the written response: stop new entries, check whether orders operated as intended, review market exposure and decide whether the strategy remains valid. Do not change rules solely to make a historical result look better, and do not assume a recovery must occur.

Trading in FOREX, COMEX and US markets carries a risk of loss, and past drawdown does not define the worst possible future decline. Review the full risk disclosure before using trading software or committing capital.