Guides › Prop firm rules explained: daily loss vs max loss vs trailing drawdown

Prop firm rules explained: daily loss vs max loss vs trailing drawdown

Three different loss lines run at once. You fail the moment you cross any one of them, so the only number that matters is the highest line.

Most prop programs use some combination of three loss limits. A daily loss limit caps how much you can lose in one day and resets each day. A maximum (static) loss limit is a fixed floor that never moves. A trailing drawdown floor rises with your equity highs. Whichever of them your program uses run at the same time and you breach on the first one you touch, so your real room is set by whichever line sits highest right now.

What this page is for

New funded traders often add these limits together or assume one replaces another. They don't. This page defines each of the three, shows how they interact, and gives you the one rule that keeps you safe: watch the highest line. To pressure-test a specific setup, use the prop firm calculator and the daily loss limit calculator.

The three limits, defined

Daily loss limit. The most you can be down within a single trading day, usually measured from your start-of-day balance or equity. It resets every day.
Maximum (static) loss limit. A fixed floor, normally initial balance minus an allowance. It does not move — not up when you profit, not down when you lose.
Trailing drawdown. A floor that ratchets up with each new equity high and never falls. See what is trailing drawdown for the full mechanics.

How it works (which line binds)

Picture three horizontal lines under your equity. You breach the instant equity touches any of them, so the line that actually constrains you is the highest one:

daily floor   = start-of-day balance − daily allowance  (resets daily)
static floor  = initial balance − max allowance  (fixed)
trailing floor = peak equity − trailing allowance  (ratchets up)
binding floor = the highest of the floors that apply
room left    = current equity − binding floor

Not every program uses all three at once — many pair a daily limit with either a static max or a trailing max. But wherever two lines both apply, the higher one wins.

Inputs and assumptions

Initial balance and current start-of-day balance.
Daily loss allowance and maximum/trailing loss allowance (dollars or percent).
Which limit types your program actually uses.
Whether floating (open) losses count, and whether trailing is intraday or end-of-day.

Worked example 1 — daily vs static

A $100,000 account with a $5,000 daily loss allowance and a $10,000 static maximum loss.

Fresh day at the start balance. Daily floor = $100,000 − $5,000 = $95,000. Static floor = $100,000 − $10,000 = $90,000. The higher line is $95,000, so today the daily limit binds — you can lose $5,000, not the full $10,000.
A rough day: balance opens at $92,000. Daily floor = $92,000 − $5,000 = $87,000. Static floor is still $90,000. Now the higher line is $90,000, so the static limit binds and your room is only $92,000 − $90,000 = $2,000, not $5,000.

The static floor never moved; you simply drifted down close enough that it became the binding line.

Worked example 2 — trailing overrides the daily allowance

A $50,000 account with a $2,500 daily loss allowance and a $2,000 intraday trailing drawdown.

Equity peaked at $52,000, so the trailing floor sits at $52,000 − $2,000 = $50,000.
Today opens at a balance of $51,000, so the daily floor is $51,000 − $2,500 = $48,500.
Binding floor = the higher of $48,500 and $50,000 = $50,000. Even though the daily rule says you could fall to $48,500, the trailing floor means a give-back of just $51,000 − $50,000 = $1,000 ends the account.

Your daily allowance was $2,500 but your usable room was $1,000. Sizing off the daily number here would have been a fast way to breach.

Common mistakes

Adding the allowances together. A $5,000 daily and $10,000 max don't give you $15,000 — you fail on the first line you hit.
Assuming the daily limit resets the max. A new day resets the daily floor; the static or trailing floor carries over untouched.
Thinking the max floor drops as you lose. A static floor is fixed; a trailing floor only ever moves up.
Sizing off the daily allowance when the static or trailing floor is actually the higher, binding line.

Frequently asked questions

Can I breach the daily and the maximum limit at the same time?

Effectively you breach whichever line your equity reaches first, and what happens next depends on the firm and the limit. Crossing the maximum (static or trailing) floor ends the account almost everywhere. A daily-loss breach varies: at some firms it fails the account outright, while at others — several futures programs in particular — it locks or flattens you for the rest of the day and you resume tomorrow. In practice the daily limit is usually the first line you meet because it sits higher early in a day.

Does the maximum loss limit reset each day?

No. Only the daily loss limit resets. The maximum loss — static or trailing — persists across days for the life of the account.

Which limit is stricter, daily or trailing?

It changes moment to moment. Right after a fresh start the daily limit usually binds; after you've built and given back profit, a trailing floor often sits higher and becomes the real constraint. Compute both and take the higher line.

Is the maximum loss the same as trailing drawdown?

Not quite. A static maximum loss is a fixed floor at initial balance minus an allowance. A trailing drawdown starts in the same place but ratchets upward with your equity highs, so over time it can sit far above the static version.

Do floating (unrealized) losses count toward these limits?

Often yes — many programs measure on equity, so an open losing position can trip a daily or trailing limit before you ever close it. Some count only realized losses. This is a per-program detail worth confirming.

Related calculators

Methodology & limitations

The definitions and formulas on this page are standard, widely used ways to describe these concepts; every worked-example number is computed by hand from the formula shown so you can reproduce it. Where a rule varies by provider (prop-firm limits especially), we say so — treat the specifics as illustrative, not as any one firm's rulebook.

Not financial advice. This page explains a concept for education only. It is not investment, trading, or financial advice, and no example is a recommendation. Every prop firm writes its own rules and changes them — always verify against your own program, broker, or account terms before acting.

Last updated 2026-07-06.

Position Math · updated 2026-07-06 · all calculators
About · Affiliate disclosure · Risk disclosure · Contact · Privacy · Cookie · Disclaimer
Information tool only — not investment, trading, tax, or financial advice. All computation runs in your browser.