Prop firm risk rules
Daily drawdown vs maximum drawdown: what traders must know before a prop firm challenge
Daily drawdown and maximum drawdown are the two loss limits most likely to end a prop firm challenge. They sound similar, but they control different risks and firms can calculate them in different ways.
Quick Definition
Daily drawdown is the maximum loss allowed within a single trading day. Maximum drawdown is the maximum total loss allowed on the account across the challenge or funded stage.
Definition
The practical difference
A daily drawdown limit protects the firm from a single bad trading day. A maximum drawdown limit protects the account from cumulative losses over the whole evaluation or funded period.
The most important detail is the calculation method. Some firms calculate daily loss from starting balance, some from equity, some from end-of-day balance, and some use trailing logic. The label alone is not enough.
| Rule | What it limits | Simple example | What to verify |
|---|---|---|---|
| Daily drawdown | Loss within one trading day | 5% daily loss on a $100,000 account means a $5,000 daily loss limit | Does it reset at midnight, broker time or another cut-off? Is it balance or equity based? |
| Maximum drawdown | Total loss from the allowed reference point | 10% max loss on a $100,000 account means the account cannot fall below the allowed $90,000 threshold | Is it static, trailing, end-of-day trailing or based on highest equity? |
Examples
Simple numerical examples
Example 1: You buy a $100,000 challenge with 5% daily drawdown and 10% maximum drawdown. A $4,800 open floating loss may be close to the daily limit even if your closed loss is smaller, if the firm uses equity.
Example 2: You lose $3,000 on Monday and $3,000 on Tuesday. You may still be inside a 5% daily limit each day, but the cumulative $6,000 loss counts toward the 10% maximum loss buffer.
Example 3: If the account grows to $104,000, some rules may still treat $90,000 as the maximum loss floor, while a trailing rule may move the floor upward. Always verify the rule wording.
Daily rule question
What is the most I can lose today before failing?
Maximum rule question
What is the lowest the account can reach before failing overall?
Risk planning question
How much buffer should I leave before opening the next trade?
Common mistakes
Mistakes that cause rule breaches
- Counting only closed trades when the firm uses equity or floating loss.
- Forgetting the daily reset time and holding a losing trade through the reset.
- Treating a trailing drawdown as if it were static.
- Increasing lot size after profit without recalculating the new risk buffer.
- Ignoring spreads, commissions and slippage near the limit.
Before buying
Drawdown checklist before paying for a challenge
- Read the exact daily drawdown formula.
- Read the exact maximum drawdown formula.
- Check whether open equity counts.
- Check reset time and time zone.
- Check whether the limit trails after profit.
- Use a drawdown calculator before sizing trades.
FAQ
Frequently asked questions
Daily drawdown is the maximum loss a trader can take within one trading day before breaching the rules. The exact calculation can depend on balance, equity and reset time.
Maximum drawdown is the maximum total account loss allowed during the challenge or funded stage. It may be static, trailing or end-of-day trailing depending on the firm.
Yes. Small losses across several days may stay under the daily loss limit but still breach the overall maximum drawdown limit.
No. Firms can use different reset times, equity rules, balance rules and trailing formulas. Always verify the official rules before buying.