Prop firm rules

Daily Loss Limit

The maximum loss allowed during a defined trading day before a rule violation occurs.

What does Daily Loss Limit mean?

A Daily Loss Limit, often shortened to DLL, restricts how much an account may lose during a trading day. The exact reset time, calculation basis and consequences of reaching the limit depend on the provider.

Why it matters

  • The DLL can be tighter than the account's overall maximum drawdown.
  • A single volatile session can therefore violate the daily rule even when the account remains above its broader drawdown threshold.
  • Some firms use a hard breach while others temporarily lock trading until the next session.

How it works

  1. 01

    The provider defines a daily starting reference or intraday calculation method.

  2. 02

    Losses are measured against that reference.

  3. 03

    At the threshold, trading may be disabled or the account may be considered breached depending on the rules.

Example

An account with a $1,000 Daily Loss Limit may have a much larger overall maximum drawdown. Losing $1,000 within the firm's defined trading day can still trigger the daily restriction first.

Common misunderstandings

  • DLL and maximum drawdown are not the same rule.
  • Different providers use different session reset times.
  • Realized and unrealized P&L treatment can differ between rule sets.
Educational reference This glossary explains terminology and general market concepts. It is not a trading signal or a guarantee of future results.