Drawdown is the decline in account or portfolio equity from a previous peak to a later low before the equity reaches a new high. It describes the damage to the capital base during a losing period, not just the result of one trade.
Drawdown matters because the same strategy feels and behaves differently after capital has already been reduced. Available risk capital is smaller, recovery requires a larger percentage gain, and emotional pressure often increases at exactly the time when process discipline matters most.
Measure drawdown from an equity peak
A simple percentage drawdown from a peak can be written as:
Drawdown % = (peak equity − current or trough equity) ÷ peak equity × 100.
If equity reaches 10,000 and later falls to 8,000 before making a new high, the drawdown from that peak is 20%. The calculation uses the previous peak as the reference point, not the initial deposit or the value of the latest trade.
Drawdown continues until a new peak is reached
A losing period does not end simply because the account has one profitable day. If equity recovers from 8,000 to 9,200 after falling from a 10,000 peak, the account is still below the high-water mark and remains in drawdown.
This is useful because it keeps the focus on the full capital path rather than allowing one short-term recovery to hide the fact that the strategy has not yet restored its prior equity peak.
Recovery becomes harder as drawdown deepens
Loss and recovery percentages are asymmetric because the recovery gain is earned on a smaller capital base. A 20% drawdown leaves 80% of the prior capital, so recovering to the original peak requires a 25% gain on what remains. A 50% drawdown leaves half the capital and therefore requires a 100% gain to recover.
This arithmetic is one reason the parent Risk Management pillar puts capital preservation ahead of aggressive recovery. Increasing risk after a large loss can deepen the problem rather than solve it.
Drawdown can be measured in money, percentage and time
The percentage decline shows the scale of capital damage. The money decline shows how much capital has been lost. Drawdown duration shows how long the account remains below its previous peak.
Two strategies can have the same maximum percentage decline but very different investor experiences if one recovers in days and the other stays underwater for months. The time dimension therefore matters when evaluating whether a strategy fits the capital objective.
This page explains drawdown; maximum drawdown is a separate metric
“Drawdown” is the general concept and the path from an equity peak to a lower level. “Maximum drawdown” is the largest observed peak-to-trough decline over a specified history.
The future `/maximum-drawdown` page in the performance-analytics cluster owns that historical performance metric and its calculation across a return series. This page stays focused on what drawdown means for risk decisions while it is happening.
Closed-trade and mark-to-market drawdown can differ
If a trader records only closed positions, open losses may not appear in the account's trade-based equity curve until the positions are exited. Mark-to-market equity includes the current value of open positions and can therefore show risk earlier.
The correct measure depends on the question being asked, but the definition should be consistent. Mixing closed-balance drawdown with mark-to-market equity drawdown can make strategy comparisons misleading.
Leverage can accelerate drawdown
When exposure is large relative to capital, ordinary market movement can create a large percentage change in equity. That is why leverage and margin belong inside drawdown control rather than being treated only as a question of how much a broker permits the account to open.
High leverage also reduces the room available for execution error, gap risk and correlated losses before the drawdown reaches a level that forces the strategy to reduce exposure.
Several small risks can combine into one large drawdown
A strategy can respect its risk per trade rule and still experience a large drawdown if it opens many positions at once, if those positions are correlated, or if loss frequency rises beyond the range assumed by the original testing.
This is why single-trade limits should be combined with portfolio exposure, correlation limits and a total drawdown response rule.
Drawdown rules should be defined before the losing period
A useful plan can specify what changes when drawdown reaches predefined conditions. Depending on the strategy, the response might be to reduce position size, stop adding correlated exposure, pause a strategy for review, or investigate whether market conditions have changed.
The rule does not need to assume that every drawdown means the strategy is broken. Normal variance can create losing periods. The purpose is to create a structured review point before capital damage becomes open-ended.
Do not automatically increase risk to recover faster
After losses, traders often feel pressure to return to the previous equity peak quickly. Increasing position size purely to “make it back” changes the risk process at the moment the account has less capital and possibly less reliable evidence about current conditions.
A recovery plan should be based on the same strategy evidence and risk budget as any other period. The equity curve does not know what price the trader wants to get back to.
Historical drawdown is evidence, not a guaranteed limit
The worst drawdown observed in a backtest or live record is only the worst drawdown that occurred in that sample. Future losses can be larger if volatility, liquidity, correlations, execution or the strategy's edge changes.
Risk decisions should therefore leave room for estimation error. Treating the historical maximum as a hard future ceiling can create false confidence.
Common drawdown mistakes
- measuring from the initial account value instead of the latest equity peak;
- calling the drawdown finished before a new peak is reached;
- ignoring open-position losses when they matter to the capital objective;
- assuming the historical maximum is the worst future drawdown possible;
- increasing risk simply because the account is below its high-water mark;
- looking at percentage depth while ignoring how long the capital remains underwater.
A practical drawdown review
When the account enters drawdown, identify the current peak-to-equity decline, the duration below the peak, the contribution of each strategy or position, the role of correlation and leverage, and whether the loss pattern is still consistent with the evidence used to approve the strategy.
If the drawdown is outside the planned range, the first task is diagnosis and risk control—not prediction about the next trade.
Drawdown inside the MFXG framework
Drawdown connects single-trade risk to long-run capital survival. Position sizing controls how much one trade can damage the account; drawdown shows what happens when losses accumulate through time.
The goal is not to eliminate drawdowns. Any strategy that accepts market risk can experience them. The goal is to keep the depth and duration inside a range the capital objective and decision process can survive.