No signup

Trading tools for prop firm traders

Twelve calculators built for systematic traders on funded accounts. Size against your drawdown floor, estimate pass probability with Monte Carlo, check consistency-rule headroom, budget the real cost to funded, and stress-test any strategy. No signup, no email required.

Run a prop firm review or deals site? Embed these calculators on your pages →

Before the calculators: a strategy needs written rules to size against. The writeup template is in how to write trading strategy rules.

Which calculator answers which question

Question	Tool	What it returns
“Will my best day block the payout?”	Consistency Rule Calculator	Best day ÷ total profit against the firm's cap, and how much more profit makes it clear
“How many contracts can I take?”	Position Size Calculator or DLL Sizing Checker	Sizes against the drawdown buffer and the daily limit, not the account balance
“Is this evaluation winnable?”	Pass Estimator	1,500 Monte Carlo paths through that firm's rules
“What will getting funded actually cost?”	Cost-to-Funded Calculator	Evaluation fees, resets and activation across expected attempts
“How long a losing streak should I expect?”	Losing Streak Calculator	The run your win rate mathematically owes you over N trades
“How far back does a drawdown put me?”	Drawdown Recovery Calculator	The gain needed to return to the floor you started from
“Is my backtest good enough to trade?”	Backtest Quality Checker	Sample size, out-of-sample split and overfitting flags

All twelve run in the browser and need no signup. Firm-specific rules behind the numbers are on the rules cards.

Pass probability

Pass Estimator

Pick account size, firm and portfolio — we run 1,500 Monte Carlo paths through that firm's drawdown rules and return modeled blow rate, P25/P50/P75 net and time-to-payout.

Decide if the eval is winnable before paying. Open estimator → Drawdown-aware sizing

Position Size Calculator

Sizes contracts against your prop-firm drawdown buffer, not just account balance. MNQ and MGC presets included; custom value-per-point for any instrument.

Right-size every trade vs the floor that actually ends accounts. Open calculator → TradingView automation

Pine Alert Generator

Builds copy-ready JSON for TradersPost (futures → Tradovate) or message lines for PineConnector (MT5 forex), with the right Pine placeholders baked in.

Skip the docs — paste the payload into TradingView. Open generator → Strategy stress test

Monte Carlo Simulator

Paste win rate, avg win, avg loss and sample size. We resample 1,000 alternate sequences and report blow rate, percentile final balance and modeled drawdown.

The single most honest test of an edge. Open simulator → Recovery math

Drawdown Recovery Calculator

Enter any drawdown percentage. See the gain required to recover. The math is asymmetric and most traders underestimate just how punishing deeper losses become.

Quick reality check before risking deep drawdowns. Open calculator → Streak math

Losing Streak Calculator

Win rate and sample size in, 5,000 simulations out: the longest losing streak to expect, its probability, and whether your risk per trade survives it.

Size for the streak before it arrives. Open calculator → Rule check

Consistency Rule Calculator

Paste your daily P&L. See your best-day share, which firm rules (30/40/50%) you pass right now, and exactly how much extra profit unblocks a breach.

Know if your best day is blocking your payout. Open calculator → Floor models

Trailing Drawdown Visualizer

One equity path, three floors: static, EOD trailing and intraday trailing on the same chart — including the unbanked-peak give-back most calculators ignore.

See which drawdown model ends the account first. Open visualizer → Funnel math

True Cost-to-Funded Calculator

Evaluation fees times realistic pass rates: expected attempts, expected total cost, and the budget for 80–95% confidence of actually getting funded.

The sticker price buys one attempt, not the account. Open calculator → Daily limit

Daily Loss Limit Sizing Checker

Instrument, DLL, stop in ticks and allowed stop-outs per day — get the max contracts that survive a normal losing day, commissions included.

Budget the stop distance, not your hopes for it. Open checker → Edge math

R-Multiple & Breakeven WR Calculator

Enter average winner, average loser, and commission. See your R-multiple, breakeven win rate, commission drag, and expectancy at common WR scenarios.

Validate strategy economics before going live. Open calculator → Backtest score

Backtest Quality Checker

Paste your backtest metrics. Get a quality score (0–100) and a list of red flags that often indicate overfitting or unreliable results.

Sanity-check any backtest in 10 seconds. Open checker →

How to use them together

The tools chain into the workflow we use to decide whether a strategy survives on a funded account — in this order:

Monte Carlo Simulator — start with your raw stats (win rate, avg win/loss, sample). If the modeled blow rate over a realistic trade horizon is high, the edge isn't funded-account-ready — fix it before paying any fee. See walk-forward vs Monte Carlo and risk of ruin.
Pass Estimator — once the edge looks robust, pick a firm and account size. The estimator runs the same kind of simulation through that firm's exact drawdown rules and returns a modeled pass probability. Cross-check against the drawdown rules taxonomy.
Position Size Calculator — size every trade against the binding drawdown buffer, not the account balance. This is where most funded accounts actually die. Background: sizing against trailing drawdown.
Pine Alert Generator — when you're ready to deploy, build alert payloads that route through your chosen bridge. Compatible with TradersPost (Tradovate) and PineConnector (MT5). Full path: how to automate MNQ on a prop firm.

Want the strategies we built around all of this? See the methodology →