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Prop firm drawdown calculator
Enter your firm's daily loss limit and maximum drawdown and see the equity level where each rule is breached today, which one comes first, and how many losing trades fit before your own safety stop. Nothing is stored or sent.
Today the daily loss limit comes first.
- Room left today
- $5,000
- Your stop with buffer
- $96,000
- Full losses until your stop
- 4
Daily loss floor: $95,000
Max drawdown floor: $90,000
4 losses at $1,000 each before you reach $96,000.
Estimate. Your firm's rule book decides.
How the calculator works
Daily loss limit: depending on your firm's wording, the percentage is taken of the balance at the start of the trading day or of the initial account size. Today's floor is the start-of-day balance minus that amount. Open trades count wherever the firm measures against equity, which many do.
Maximum drawdown: with a static drawdown the floor stays fixed below the initial balance. With a trailing drawdown it moves up with the highest balance you have reached, always by the same distance.
Whichever floor is higher ends the account first, so that is the one that counts today. The safety buffer puts your own stop a little above it, because spread, commission and slippage can push a closing trade past the limit.
Example: $100,000 account, 5% daily limit, 10% static drawdown
You start the day with a balance of $101,000. The daily limit is 5% of that, $5,050, so today's floor is $95,950. The static drawdown floor is $90,000. The daily floor is higher, so it is the one that counts.
With an equity of $100,500 you have $4,550 of room. With a 1% buffer your own stop sits at $96,950. That leaves $3,550: three full losses at 1% risk ($1,000 each).
Where the numbers often go wrong
- Counting only closed trades. If your firm measures equity, an open loss uses up the daily limit before you close it.
- Using the wrong reset time. The trading day usually starts at the firm's server time, not at your local midnight.
- Forgetting that a trailing drawdown moves up. After a good week the floor is closer than it was on day one.
- Sizing the next trade without looking at the room left. One full loss can be bigger than what is left of today's limit.
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Frequently asked questions
Does the daily loss limit count open trades?
At many prop firms, yes: the limit is checked against equity, so a floating loss counts before you close the trade. Some firms only count closed trades. Check your firm's rules and use the stricter reading if you are unsure.
What is the difference between a static and a trailing drawdown?
A static drawdown has a fixed floor, for example $90,000 on a $100,000 account with 10%. A trailing drawdown follows your highest balance: at a peak of $106,000 the floor moves up to $96,000. Some firms trail the highest equity instead, or stop trailing once the floor reaches the starting balance. The calculator does not model either.
Why set a buffer above the firm's limit?
A position is closed at the next available price. With spread, commission and slippage the loss can end up slightly bigger than planned, especially in fast markets. A buffer of 0.5 to 1% of the account absorbs that.
Are the results exact?
They are as exact as your inputs. Firms differ in reset times, in what counts as balance and in special rules, so treat the result as a check, not as your firm's official figure. The calculator runs only in your browser and stores nothing.
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The results are estimates based on your inputs. Check your prop firm's rules and your broker's contract specifications before you trade. Not financial advice. Trading involves risk.