# Trailing Drawdown: What It Is and How It Works

> Trailing drawdown is a loss limit that rises with an account's high-water mark and never falls. See a worked example and how it differs from static drawdown.

Source: https://www.propexecutor.com/glossary/trailing-drawdown
Published: 2026-10-03
Updated: 2026-10-02
Publisher: PropExecutor

## Key points

- Trailing drawdown is a maximum loss limit whose failure level rises with the account's high-water mark and never moves back down.
- Illustration: a $100,000 account with a $5,000 trailing drawdown that peaks at $104,000 fails if equity falls to $99,000.
- Static drawdown fixes the failure level below the starting balance, so it is less restrictive for the trader than trailing drawdown at the same amount.
- Intraday trailing drawdown updates from live equity including unrealized profit; end-of-day trailing drawdown updates only from the daily close.
- Some firms lock a trailing drawdown at the starting balance once the account reaches the starting balance plus the drawdown amount.

Trailing drawdown is a maximum loss limit whose failure level rises with an account's high-water mark and never falls. For example, on a $100,000 account with a $5,000 trailing drawdown that peaks at $104,000, the failure level has moved up to $99,000, so the account fails if equity drops to $99,000, even though that is above $95,000.

The high-water mark is the highest balance or equity the account has reached. Firms decide whether the trail updates intraday or at end of day, and whether it stops at a lock point. Both choices are covered below.

## Why it matters to a prop firm

The maximum drawdown rule decides how much of the firm's simulated capital a trader can give back before an account fails. A trailing drawdown protects profits as well as the starting balance. A trader who runs a $100,000 account up to $108,000 cannot then lose all of that gain plus the original allowance before failing. With a $5,000 trail, the failure level has moved to $103,000.

For a firm designing a challenge, this is a commercial choice as well as a risk one. A trailing limit tends to make a challenge harder to pass than the same amount set as a static limit, because gains given back count against the trader. It is also easier to misunderstand, so the rule has to be written plainly in the challenge terms and shown live to the trader.

## A worked example (illustration)

The numbers below are a worked illustration, not any firm's actual rule. They assume an intraday trail on equity. Take a $100,000 evaluation account with a $5,000 trailing drawdown:

1. **Start:** the high-water mark is $100,000, so the failure level is $95,000.
2. **Equity rises to $104,000:** the high-water mark becomes $104,000 and the failure level trails up to $99,000.
3. **Equity falls back to $101,000:** the failure level stays at $99,000. It never moves down.
4. **Equity drops to $99,000:** the account has given back $5,000 from the $104,000 peak, so it breaches the rule and fails, even though it is still only $1,000 below its $100,000 starting balance.

Under a static $5,000 drawdown, the same account would still be trading at step 4, because its failure level would remain at $95,000. Under an end-of-day trail, the outcome could differ: if the $104,000 peak happened within a day and the account closed lower, the high-water mark might never have reached $104,000.

## Trailing vs static drawdown

Static drawdown is a maximum loss limit fixed at a set amount below the starting balance that does not move, however much the account gains.

| | Trailing drawdown | Static drawdown |
|---|---|---|
| Failure level | Rises with each new high-water mark | Fixed below the starting balance |
| Protects profits | Yes, up to the trail or lock point | No, only the starting balance |
| Restrictiveness | Stricter at the same amount, especially for strategies that let winners run | Less restrictive at the same amount |
| Common confusion | What counts as a "high" (equity or balance, intraday or end of day) | Few; the number never changes |

Both are overall limits across the life of the account. A daily loss limit is different: it caps how much an account can lose within one trading day and resets each day. Most challenges use a daily limit alongside a maximum drawdown, static or trailing.

Which maximum drawdown suits a challenge depends on the trader profile, the price point and the risk the firm will carry; that decision is the subject of a separate guide on trailing vs static drawdown for prop firms. For how drawdown rules fit the wider risk setup, see our article on [what to look for in prop firm risk management software](https://www.propexecutor.com/blog/prop-firm-risk-management-software).

## Intraday vs end-of-day trailing

The two common variants differ in when the high-water mark is updated:

- **Intraday trailing** uses live equity, including unrealized profit. If an open trade is up $3,000 and then closes flat, the failure level has already moved up $3,000. This is the strictest version.
- **End-of-day (EOD) trailing** updates the high-water mark only from the balance or equity at the daily close, so swings within the day do not raise the failure level.

The same account can pass under EOD trailing and fail under intraday trailing, so the variant must be stated in the challenge terms.

## Where the trail locks

A lock point is the level at which a trailing drawdown stops trailing. A common design locks the failure level at the starting balance once the high-water mark reaches the starting balance plus the drawdown amount. On the illustration's $100,000 account with a $5,000 trail, the failure level would lock at $100,000 once equity touched $105,000; the example account peaked at $104,000, so it never reached the lock. Not every firm uses a lock, and the trigger varies, so define it explicitly.

## Configuring the rule

When setting a trailing limit, decide and document:

1. The drawdown amount, as a fixed sum or a percentage of the starting balance.
2. Whether the high-water mark uses equity (including open profit) or closed balance.
3. Intraday or end-of-day updating.
4. Whether and where the trail locks.
5. How the trader sees their remaining headroom in real time.

Timing of the check matters as much as the formula. A trailing limit checked on a delayed batch can catch a breach late; our explainer on [why breach checks must run on every tick](https://www.propexecutor.com/blog/prop-firm-real-time-rule-engine) covers the reasoning.

In PropExecutor, maximum drawdown can be set as static or trailing in the visual rule builder, and the [rule engine checks drawdown on every price tick](https://www.propexecutor.com/prop-firm-rule-engine) as it arrives. The built-in prop dashboard shows each trader their maximum drawdown headroom inside the terminal. Rule sets are versioned, so a firm can switch new accounts to a trailing rule without changing accounts already running. For other challenge terms, such as daily loss limit and minimum trading days, browse the [prop firm glossary](https://www.propexecutor.com/glossary).

Maximum drawdown is one of the core rules on every PropExecutor plan, Starter included; to set a trailing rule on your own challenge accounts, see [PropExecutor's plans and one-time prices](https://www.propexecutor.com/pricing).

## Frequently asked questions

### Is trailing drawdown harder than static drawdown?

Trailing drawdown is usually stricter, because the failure level rises with every new high and profits given back count against the trader. Static drawdown is simpler to understand and plan around. Neither is better in general; the right choice depends on the trader profile, challenge price and how much risk the firm wants to carry on simulated capital.

### Does trailing drawdown count unrealized profit?

It depends on the variant. Intraday trailing uses live equity, so unrealized profit on an open trade raises the failure level even if the trade later closes flat. End-of-day trailing ignores swings within the day and updates only from the daily close. A firm should state which variant applies in its challenge terms.

### When does trailing drawdown stop trailing?

Under a common design, trailing drawdown stops once the high-water mark reaches the starting balance plus the drawdown amount, locking the failure level at the starting balance. Not every firm uses a lock point, and triggers differ, so traders should read the specific challenge rules and firms should define the lock explicitly.