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Prop-firm drawdown calculator: how much room today leaves you.
The two numbers a challenge trader needs before the next trade: how much more can be lost today, and how much more can be lost at all. Enter your programme's rules and your P&L so far, and get both — with the honest caveat that closed trades are a floor on the loss, never the ceiling.
Firms measure daily loss on equity, which includes open positions. This works from closed P&L, so every remaining figure here is a ceiling on what you actually have — leave room for anything still open. Read the percentages from your own agreement; they differ by firm and change.
Current balance (closed)
$102,400
Peak used for the floor
$100,000
Starting balance
Left to lose today
$3,800
Daily limit $5,000 · used $1,200 on closed trades
Left to lose at all
$12,400
Floor $90,000 (static · 10% of start)
Room before the next trade
$3,800
The smaller of the two — the loss that would end the day or the challenge, whichever comes first, on closed trades.
How it's computed
The arithmetic, in the open.
The daily loss limit is a percentage of the starting balance. Today's used amount is whatever you are down on closed trades; the remaining is the limit minus that. Most firms measure this on equity, including open positions, so treat the remaining figure as an upper bound.
The maximum loss sets a floor under the balance. Static: floor = starting balance − limit, fixed for the whole challenge. Trailing: floor = highest balance reached − limit, so it rises as you make money. Getting this one wrong flatters a losing account; our guide explains both with examples (prop-firm rules, explained).
Room before the next trade is the smaller of the two remaining amounts — the loss that would end the day or the challenge, whichever comes first. Sizing so that a normal losing day cannot reach it is most of what passing a challenge consists of (position sizing).
This tool works from totals you type in. Sage's Prop Challenge does the same arithmetic on your actual journaled trades, day by day under the firm's day reset, with breach detection on the day it happened and every attempt kept with its cause.
Questions, answered
- Which firm's rules does this use?
- Yours. Enter the daily-loss and maximum-loss percentages from your own agreement and whether the maximum trails. Firms' numbers differ and change, so none are built in.
- Static or trailing — what is the difference?
- Static measures the maximum loss from the starting balance, so the floor never moves. Trailing measures it from the highest balance you have reached, so the floor rises with your profits and a good start can be given back and still end the challenge.
- Why does it say closed P&L is a ceiling on my room?
- Because firms measure daily loss on equity, which includes the floating loss of open positions. This calculator only knows what has closed, so the true room is what it shows minus whatever is currently open against you.
- What time does 'today' reset?
- At the firm's server midnight — often a Central European time — not yours. If your session spans that reset, the day's total starts again. Sage's Prop Challenge lets you set the offset explicitly; here, enter today's P&L as the firm would count it.
- Can I rehearse a challenge before paying?
- Yes. Sage's backtest sessions can run in prop-challenge mode with the same rules on the replay clock, locking on a breach and issuing a certificate on a pass.
Keep going
- FeatureProp Firm TrackerTrack a prop-firm challenge against the rules as firms measure them: daily loss with the firm's day reset, static or trailing max loss, profit target and minimum trading days. Distance to every limit before the next trade, every attempt kept with its cause. Free.
- GuideProp-firm challenge rules, explained the way they are measuredHow prop-firm challenge rules are actually measured — daily loss on equity, static vs trailing drawdown, minimum trading days, server-time resets — and how to track your distance to each limit before the next trade.
- Free toolPosition size calculatorSize a trade from the money you are willing to lose: account balance, risk percent, stop distance and pip or point value give you units and lots. Forex, gold, indices and futures.
- GuidePosition sizing: size the trade from the risk, never the other way roundThe one formula that decides your survival: units = money at risk ÷ stop distance. Worked examples for forex, gold and indices, why fixed-fractional beats fixed lots, and how sizing interacts with prop-firm limits.
- FeatureBacktesting & Market ReplayBacktest a discretionary strategy the honest way: a full TradingView workspace paused at your cursor, no lookahead on any of 16 timeframes, intrabar fills from 1-minute data, trades you place in the moment, and an exact R:R simulator. Free.
- GuideTilt and revenge trading: catch it in the data, not in hindsightRevenge trading has a signature your journal can detect: an entry minutes after a loss, often at bigger size. How to spot it from timestamps, what it costs in R, and the rules that actually hold when you are angry.
This number, on every trade, automatically.
Sage records the stop at fill, so R, size and prop-firm headroom are computed for you on every journaled trade. Free, no card.
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