At a glance
The short version
One Stop Prop runs 4 evaluation programs for forex and CFD traders. The headline one, 2-Step (Standard), asks for 8% then 5% across 2 phases with a 8% static max loss and a 4% daily loss limit. This page puts every One Stop Prop rule set in one table, runs each through thousands of simulated challenges to show what the rules alone do to your odds, and opens a chart that enforces them candle by candle — so you can rehearse the One Stop Prop challenge on real historical data before you pay for one.
One Stop Prop challenge rules, program by program
Rules as published on onestopprop.com, checked 21 October 2026. Prop firms revise rules often — confirm on their site before you buy; the source for each program is in the fine print below. Account sizes offered: $10k, $25k, $50k, $100k, $200k, $300k.
What the One Stop Prop rules do to your odds
The same trader passes one firm's challenge far more often than another's, and the difference is the rules, not the trader. To isolate it, each program below was run through the CRTLAB challenge simulator for three traders: a break-even one (50% wins at 1:1 — zero edge, so any pass is the rules' slack plus luck), a small edge (45% at 1:1.5) and a solid edge (45% at 1:2).
Of One Stop Prop's 4 programs, 1-Step (Standard) leaves a break-even trader the most room (40% pass) and 2-Step (Pro) the least (9.8%).
| Program | Break-even trader | Small edge | Solid edge |
|---|---|---|---|
| 2-Step (Standard) | 25.9% | 64.2% | 88.2% |
| 2-Step (Pro) | 9.8% | 28.6% | 55% |
| 1-Step (Standard) | 40% | 69% | 87.4% |
| 1-Step (Pro) | 16.7% | 34% | 56.7% |
Simulated: $100k account, 1% risk per trade, 2 trades a day, 60 trading days or the program's own limit; multi-phase programs multiply each phase's pass rate. Min-day and consistency rules are not simulated. Run your own numbers in the prop firm challenge calculator.
The rule most likely to end a One Stop Prop attempt
On 2-Step (Standard) the target (8%) is no larger than the loss allowance (8%). That is a generous shape — the account can absorb as much as it needs to make — and it is why this program's odds sit close to what your edge alone would predict.
The max loss is static, measured from the starting balance — the most forgiving kind. Profit you bank widens your room rather than dragging the floor up behind you.
There is a 4% daily loss limit. With only 8% in total, two bad days are the whole account.
You need at least 4 trading days before a phase can pass, so a single big day does not finish it.
A 25% consistency rule applies: your best day can be at most 25% of total profit. One outsized winner can leave you above the target and still not passed.
In simulation, a trader with a small edge (45% wins at 1:1.5, 1% risk) fails 20.1% of phase-one attempts on the max loss; the ones who pass take a median of 15 trading days.
Rehearse the One Stop Prop challenge on a real chart
The button opens CRTLAB with prop firm mode running on One Stop Prop's 2-Step (Standard) rules. The chart's HUD carries your progress to target, the distance to the max loss and the daily floor, and it calls the verdict — passed, phase two, or breached — the moment a rule is hit, exactly as the firm's dashboard would. Every One Stop Prop program and account size is one click away in the rules panel, and so are the other 98 firms in the catalogue.
What makes it a rehearsal rather than a demo account: you replay real historical data, candle by candle, on any of 38 markets from 1-minute to weekly, and you can do in an evening what a live challenge takes a month to show you. Run the same week three times with three different risk sizes and watch which one the static floor catches.
There is no account to fund and no time limit on practice — the replay waits for you. When your rehearsals pass consistently, you know the edge survives One Stop Prop's rules before the fee is spent.
One Stop Prop fine print worth knowing
2-Step (Standard): Split 90%. One Stop Prop's rules page.
2-Step (Pro): Split 100%. One Stop Prop's rules page.
1-Step (Standard): Split 90%. One Stop Prop's rules page.
1-Step (Pro): Split 100%. One Stop Prop's rules page.
Frequently asked questions
Is this the official One Stop Prop challenge?
No. CRTLAB is an independent backtesting platform and is not affiliated with One Stop Prop. It reproduces One Stop Prop's published rules (checked 21 October 2026) so you can practise against them on historical data; passing here does not fund an account.
What is the One Stop Prop max drawdown?
2-Step (Standard): 8% static; 2-Step (Pro): 6% intraday trail; 1-Step (Standard): 6% static; 1-Step (Pro): 5% intraday trail.
Does One Stop Prop have a daily loss limit?
2-Step (Standard): 4%; 2-Step (Pro): 4%; 1-Step (Standard): 4%; 1-Step (Pro): 3%.
What is the One Stop Prop profit target?
2-Step (Standard): 8% then 5%; 2-Step (Pro): 10% then 5%; 1-Step (Standard): 8%; 1-Step (Pro): 10%.
Is the One Stop Prop simulator free?
CRTLAB is free to try. You get prop firm mode with One Stop Prop's rules and every other firm's, with every tool the product has, for your first 10,000 candles of replay — roughly two hours of stepping through a chart, no card needed. After the sample, unlimited replay is $14.99 a month, cancel any time. Prop firm mode itself is never behind a paywall.