Prop Firm Challenge Calculator
A prop firm challenge sets a profit target and a daily and total loss limit; this tool converts those published rules, plus a risk-per-trade and edge you enter, into what they mathematically require: trades needed to reach the target, and how many consecutive losing trades reach each loss limit. It is arithmetic, not a forecast.
At 1% risk per trade, the rules allow 4 losing trades in a day before the daily loss limit is reached, and 10 in a row before the total loss limit is reached. This is what the stated rules require, not a forecast of what will happen.
Continue with your own chart. Upload a screenshot first, then choose Pro or Elite before Lynx runs the analysis.The numbers are only as good as the levels you typed. Upload a chart screenshot and Lynx AI reads the structure for you, so the levels come off the chart instead of a guess.
See an AI chart readHow to calculate what the rules require
Expectancy per trade, as a percent of the account, comes from the same formula used everywhere:
Expectancy % = (Win rate × Risk % × Reward:risk) - (Loss rate × Risk %)Trades to target is the profit target divided by that expectancy, rounded up. Consecutive losses to a breach is the relevant loss limit divided by the risk per trade, rounded up, since every one of those trades losing exactly the risked amount is the fastest way a fixed risk-per-trade plan reaches that limit. Daily-loss-safe trades is one less than the daily count, the number of same-day losers the account can still absorb without breaching. See lib/tools/prop-firm-challenge.ts for the exact implementation.
A worked example
An 8% profit target, 4% max daily loss, 8% max total loss, risking 1% per trade at 2R reward:risk, with a 50% win-rate assumption:
- Expectancy = (0.50 × 1% × 2) − (0.50 × 1%) = 1% − 0.5% = 0.5% per trade
- Trades to target = 8% ÷ 0.5% = 16 trades at that expectancy
- Consecutive losses to the daily breach = 4% ÷ 1% = 4, so 3 same-day losers are still inside the limit
- Consecutive losses to the total breach = 8% ÷ 1% = 8
Halve risk per trade to 0.5% and the daily-breach count doubles to 8, but trades to target also doubles to roughly 32. There is no setting that improves both numbers at once; the tool exists to make that trade-off visible before an account is live, not to resolve it for you.
What the rules mathematically require
Every number this tool prints follows from three things you already control: the risk taken per trade, the reward:risk ratio traded, and an honest win-rate estimate. None of it measures discipline, and none of it can. A trader who enters these exact numbers and then doubles size after a loss will breach the daily limit faster than the calculator shows, because the calculator assumes the risk per trade stays fixed. The arithmetic describes a plan followed exactly; whether a plan is followed is a discipline question this page does not touch.
The daily loss limit is what caps risk per trade in practice, not the total loss limit. A total limit that looks generous is still constrained trade to trade by whatever the daily limit allows, which is why the daily-loss-safe trades figure, not the total, is usually the binding number for how large a single position can be.
When it misleads you
The win rate is an input you supply, not a measured fact, and the output is only as trustworthy as that estimate. The consecutive-loss counts describe the fastest path to a breach, an unbroken losing streak at fixed risk, which is a useful worst case but not the typical one; a real trading record breaches limits through a mix of losing streaks and size creep, not usually through one uniform run. And every output here treats risk per trade as constant, so any plan to increase or decrease size intraday makes these specific numbers wrong for that session. Read the challenge’s own published rules before relying on any of this, since programs change loss-limit definitions, consistency requirements and reset schedules without much notice.
How to use this tool
- Enter the profit target. As a percent of the starting account, from the challenge’s own rules.
- Enter the max daily loss and max total loss. Both as a percent of the account. The tool expects the daily limit to be no larger than the total limit.
- Enter risk per trade and reward:risk. The percent of the account risked on one trade, and the reward:risk ratio (R) you plan to trade at.
- Enter a win rate assumption. Your own estimate, from a trading journal if you have one. The output is only as good as this number.
- Read what the rules require. Expectancy per trade, trades to reach the target at that expectancy, and how many consecutive losses would reach each loss limit.
Frequently asked questions
What does a prop firm challenge calculator do?
It takes the numbers a challenge already publishes, the profit target, the daily and total loss limits, plus a risk per trade and an edge you supply, and works out what those rules mathematically require: how many trades it takes to reach the target at that edge, and how many consecutive losing trades would reach the daily or the total loss limit at that risk per trade. It does not evaluate you, and it does not know your trading.
Why doesn’t this tool estimate whether I will succeed?
Because no reliable number exists to estimate it with. Firms rarely publish outcome statistics, and results depend on discipline and variance that no calculator can see, so any figure claiming to measure that would be invented. What the rules mathematically require, the trades-to-target and the consecutive-loss counts, is real arithmetic you can check by hand; an estimate of a human outcome is not.
What is the difference between the daily loss limit and the total loss limit?
The daily loss limit caps what a single session can cost and typically resets the next day. The total loss limit caps the decline from the account’s starting balance or its peak, and does not reset. The consecutive-loss counts this tool shows are for each limit separately, at the risk per trade you entered, because the two limits are usually breached by different failure patterns.
How does risk per trade change these numbers?
Directly, and by a lot. Consecutive losing trades to a breach is roughly the loss limit divided by the risk per trade, so halving risk per trade roughly doubles how many losing trades in a row the account can absorb before that limit is reached. The trade-off is that smaller risk per trade also means more trades are needed to reach the profit target at the same edge, which this tool also shows.
Is this prop firm challenge calculator free?
Yes. It runs entirely in your browser, there is no signup, and nothing you enter is sent to a server. The numbers come from the rules table you supply and the arithmetic on this page, so you can reproduce every figure with a calculator of your own.
Related tools and guides
- Prop firm challenge chart review with AI: documenting a pre-trade plan and invalidation inside FTMO, Topstep or Apex rules.
- Expectancy calculator: the same expectancy math for an ordinary account, with a 100-trade projection.
- Position size calculator: the exact size for a risk budget and stop distance, for sizing a single trade against a daily limit.
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Educational only. Not financial advice. NFA. Bullynx is not a registered investment adviser or broker-dealer. Trading and investing involve significant risk of loss. Read the full risk disclosure.