Prop Firm Trailing Drawdown Calculator
Translate your own static, end-of-day trailing or intraday trailing drawdown convention into a visible floor, high-water reference and arithmetic headroom. Optional lock and withdrawal inputs stay explicit; the calculator never decides whether a provider has recorded a breach.
Enter one verified drawdown convention
Choose the reference timing and copy the exact value basis, amount and lock from the current program terms.
Entered drawdown state
Entered Prop-Firm Rule Planning 1.0.0
On smaller screens, scroll horizontally to inspect the complete entered and derived audit.
| Stage | Reference or value | Entered floor | Signed distance | Relationship |
|---|
How the entered drawdown floor is calculated
Uncapped floor = trailing high − drawdown amount
Applied floor = min(uncapped floor, entered maximum floor), when a lock is enabled
Static mode subtracts the entered drawdown amount from the starting reference and holds that floor unchanged. It does not use either high-water input.
End-of-day and intraday modes use the same visible high-water arithmetic but keep different labels because the provider decides when a reference value is sampled. The calculator does not convert one timing convention into another.
The updated reference is the greatest of the starting value, previous high and latest entered reference. This makes the mathematical floor non-decreasing when the same drawdown amount and lock are retained.
An optional lock is treated as the highest level to which the floor can rise. The uncapped candidate remains visible, so a user can distinguish raw trailing arithmetic from the entered lock.
The withdrawal row subtracts the entered amount from the current rule-defined value while holding the floor fixed. Some providers reset, freeze or recalculate rules after a payout; Version 1.0.0 does not infer that treatment.
Worked example from the audited fixture
The audited example starts at 50,000 with a 2,000 drawdown amount, previous high 50,500, latest end-of-day reference 51,200, a maximum floor of 50,000, current rule-defined value 50,800 and a 500 withdrawal scenario.
- The initial floor is 48,000. The updated high is 51,200, so the uncapped and applied floor is 49,200; it has risen 1,200 and remains 800 below the entered lock.
- Current arithmetic headroom is 1,600. Holding the floor fixed, the post-withdrawal value is 50,300 and its arithmetic headroom is 1,100. Neither relationship is a provider breach or payout decision.
Reproduce it: select “Load audited example” above. The governed fixture was independently recomputed from decimal arithmetic and UTC date-only rules.
How to interpret the result
- Confirm the rule-type label first. The same numbers can mean different things under static, end-of-day and intraday reference timing.
- Read applied floor beside uncapped floor. A difference means the entered maximum floor is limiting further upward movement.
- Current headroom is signed arithmetic. A positive value is above the entered floor, zero is equal and a negative value is below it.
- Do not turn headroom into a recommended loss budget. Slippage, open positions, commissions and provider liquidation timing can consume more than an intended stop.
- Treat the withdrawal row as a fixed-floor scenario only. Re-enter the rule after any provider-side payout adjustment.
- Save the provider page, product, phase, value basis and last-verified date outside this calculator so the inputs remain auditable.
Assumptions and limits
- No balance, equity, open-position, provider dashboard or broker feed is connected.
- The page cannot identify which high-water observations a provider includes or when a session closes.
- The lock is a user-entered maximum floor; no lock trigger or provider policy is inferred.
- Withdrawal effects on the high-water reference, drawdown amount, floor and account status are not modeled.
- Gaps, slippage, costs, liquidation, rejected orders, market closures and losses beyond stops are outside the arithmetic.
- No buffer, withdrawal, position size, risk percentage, provider, strategy or trade is recommended.
Which prop-firm calculator answers which question?
The three Batch 48 tools separate a drawdown floor, an allocation ladder and a date calendar. The existing Challenge Planner keeps target and day counts, while the existing Payout Split Calculator keeps reward-share arithmetic. This prevents one convenient screen from implying a provider verdict it cannot make.
| Tool | Primary input | Primary output | Hard boundary |
|---|---|---|---|
| Trailing Drawdown | Reference values, amount and optional lock | Entered floor and signed arithmetic distance | No provider breach decision |
| Scaling Plan | Allocation, increment, cap and reference percentages | Tier-by-tier entered allocation ladder | No provider scale-up approval |
| Payout Date | Anchor, counts, weekdays and exclusions | Earliest candidate request and processing dates | No qualification or delivery promise |
Frequently asked questions
- It translates an entered static, end-of-day trailing or intraday trailing convention into an initial floor, updated high-water reference, applied floor and signed arithmetic distance.
- Version 1.0.0 takes the greatest of the starting, previous-high and latest-reference values, then subtracts the entered drawdown amount.
- When enabled, it is the highest level to which the calculated floor can rise. The uncapped candidate remains visible beside the applied floor.
- No. It is only a signed arithmetic relationship. Slippage, open positions, costs, session timing and provider liquidation rules remain outside the result.
- No. The calculator does not read the provider account or determine breach, liquidation, reset, closure or appeal status.
- The entered withdrawal is subtracted from the current rule-defined value while the entered floor is held fixed. Provider recalculation after payout is not inferred.
- They retain separate timing labels, but both use entered reference values. The page does not decide when a provider samples balance, equity or unrealized profit.
- No. It recommends no buffer, withdrawal, position size, risk percentage, provider, strategy, signal or trade.
Sources and methodology
- Topstep — Maximum Loss Limit — A current official example of end-of-day trailing, non-decreasing and locking behavior; not a preset.
- Topstep — Payout Policy — Official evidence that a payout can change a loss limit and related account arithmetic.
- CFTC — trading-system risk advisory — Official warning about hypothetical results and material differences from actual trading.
Version 1.0.0 performs deterministic local arithmetic and uploads no entered values. Official provider pages establish that definitions vary; they do not become embedded presets. Verify the current program, phase, cohort and legal terms before each use.
Continue from a floor to the rest of the rule set
Keep broker execution separate from prop-firm rules
Prop-firm arithmetic does not replace the broker or platform specification for volume, margin, price, session, liquidation and order execution. Verify both rule sets before exposing capital.
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