Risk: Prop challenges, including futures prop firms, are paid tests: most people don’t pass, the fee is usually lost, and funded accounts are usually simulated.
Stage 5: Getting Ready for a Prop Challenge · Module 15 · Lesson 3 of 12 · Back to the prop challenge stage · Course
In a challenge, the question isn’t “how fast can I hit the target?” It’s “how do I make sure an ordinary run of losses can’t end this?” Most failed challenges aren’t one disaster. They’re a normal losing streak, at a size that was too big for the rules. This lesson shows you how to work backwards from the rules to a risk per trade that gives your strategy room to work.
Step 1: Write down the limits in pounds
All figures are made up for teaching purposes. They aren’t any firm’s real rules.
Take a £10,000 challenge with these rules:
| Rule | % | In £ |
|---|---|---|
| Profit target | 8% | £800 |
| Daily loss limit | 5% | £500 |
| Maximum loss (static) | 10% | £1,000 |
Everything that follows is measured against these three numbers.
Step 2: Set a personal daily stop well inside the firm’s limit
Never let the firm’s limit be the thing that stops you. Set your own daily stop at well under half of it – for example 2% (£200). When you hit it, you stop for the day, with £300 of buffer still unused. That buffer is there for things you can’t control: slippage, a gap, a trade that’s still open when the stop is hit.
Do the same for the week: for example, a 4% weekly stop. And if your total drawdown reaches half the maximum (here, down £500), cut your risk per trade in half until you’ve recovered.
Step 3: Compare risk-per-trade options
How many losing trades in a row can you take at each size before you hit each limit?
| Risk per trade | £ per trade | Losses to hit your 2% daily stop | Losses to break the 5% daily limit | Losses to hit the 10% maximum | Winning trades at 2R needed for the 8% target (with no losses) |
|---|---|---|---|---|---|
| 0.25% | £25 | 8 | 20 | 40 | 16 |
| 0.5% | £50 | 4 | 10 | 20 | 8 |
| 1% | £100 | 2 | 5 | 10 | 4 |
| 2% | £200 | 1 | 3 (on the third) | 5 | 2 |
The 2% row looks fast: two good trades and you’re nearly there. But five losses in a row – which, as you’ll see below, is very common – ends the challenge.
Step 4: Check it against losing streaks
Losing streaks happen to every strategy. The table below is our own calculation of the chance of at least one run of losses of a given length in 100 trades, if each trade is independent and the win rate stays the same. Real trading is messier, but it’s a useful guide.
| Win rate | Chance of 5+ losses in a row | 6+ in a row | 8+ in a row | 10+ in a row |
|---|---|---|---|---|
| 50% | 81% | 55% | 17% | 4% |
| 40% | 98% | 87% | 49% | 20% |
So for a strategy that wins 40% of the time (common for strategies aiming at 2R or more), a run of 6 losses somewhere in 100 trades is close to certain, and a run of 8 is roughly a coin flip.
- At 2% per trade, 5 losses in a row = −10%: challenge over.
- At 1%, 8 losses = −8%: alive, but only just.
- At 0.5%, 8 losses = −4%: uncomfortable, but well within the rules.
There’s no “correct” number for everyone. But this is why many experienced traders keep challenge risk around 0.25–1% per trade, and why a smaller size usually gives your strategy a fairer test. More on coping with the emotional side in How to handle a losing streak.
Step 5: Turn % risk into a position size
The size depends on your stop, not on how confident you feel.
Spread bet: stake per point = £ risk ÷ stop in points. CFD / lots: lots = £ risk ÷ (stop in pips × pip value per lot in £).
Illustrative figures – check the contract details on the platform you use:
- EUR/GBP, risk £50, stop 20 pips. Pip value per standard lot = £10. Lots = £50 ÷ (20 × £10) = 0.25 lots.
- GBP/USD, risk £50, stop 20 pips, GBP/USD at 1.2650. Pip value per lot ≈ $10 ÷ 1.2650 ≈ £7.91. Lots = £50 ÷ (20 × £7.91) ≈ 0.316 – round down to 0.31 lots.
- UK 100 CFD at £1 per point per contract, risk £50, stop 25 points: £50 ÷ 25 = 2 contracts.
Always round down. (The full method, with more examples, is in Position sizing step by step and Pip, point and tick values.) Many challenge accounts are in US dollars; if so, do the maths in dollars.
Futures version: risk per trade in ticks
On a futures challenge, you size in contracts rather than stake per point. The method is the same: contracts = risk per trade ÷ (stop in ticks × tick value), rounded down (see 1F.8).
Hypothetical: $50,000 futures evaluation, $2,000 trailing drawdown. You choose to risk 5% of the drawdown per trade = $100.
- MES, stop 8 points = 32 ticks × $1.25 = $40 per contract → 2 contracts ($80 at risk).
- MNQ, stop 30 points = 120 ticks × $0.50 = $60 per contract → 1 contract ($60).
- Even with a 10-contract limit, 10 MES on that 8-point stop would risk $400 – a fifth of the whole drawdown on one trade.
With an intraday trailing drawdown, remember that open profit you give back still moves the floor up. Plan where you’ll take partial profits before you enter.
Step 6: Count total open risk, not just each trade
Two trades at 0.5% on EUR/USD and GBP/USD are close to one 1% bet on the US dollar (see Currency correlations and Correlation and over-exposure). Set a maximum total open risk – for example 1.5% – and count correlated trades together. And remember that spreads, commissions and slippage add to every loss.
Step 7: Don’t speed up to catch up
Two habits fail more challenges than almost anything else:
- Raising risk after losses to “get back on track”. It turns a drawdown into a failure.
- Raising risk near the target to “finish it today”. One loss at double size can wipe out a week.
If the challenge has no time limit, there’s nothing to catch up with. If it does, work out in advance whether your tested strategy can realistically reach the target in that time at your normal size. If it can’t, that challenge isn’t a good fit for your strategy – don’t change your size to make it fit.
A word on trailing drawdown
With a trailing drawdown, your room to lose is measured from your highest point, not your start. After a good run, the floor moves up behind you. Keep your risk the same size in pounds as you started with, rather than increasing it as the account grows, until the drawdown stops trailing (if it does).
How long might it take? (illustrative)
Suppose your demo testing over 150+ trades suggests your strategy averages +0.2R per trade after costs (that is, its expectancy). At 0.5% risk, that’s an average of +0.1% per trade, or roughly 80 trades to reach 8% – on average. In reality, some runs will get there in 30 trades and some will drift for 200 or hit a limit first. If your strategy has no real edge after costs, no position size will make a pass likely.
Key takeaways
- Work backwards from the firm’s limits in pounds.
- Set a personal daily stop at well under half the firm’s daily limit, plus a weekly stop.
- Long losing streaks are normal: size so that 8–10 losses in a row don’t end the challenge.
- Size from your stop, round down, and count correlated trades as one.
- Never increase risk to catch up or to finish faster.
Quick quiz
- A £25,000 challenge has a 4% daily limit. What’s that in pounds, and what might a sensible personal daily stop be? (£1,000; for example 1.5–2%, or £375–£500.)
- At 1% risk per trade, how many consecutive losses break a 5% daily limit? (5.)
- Risk £60 with a 15-pip stop on EUR/GBP (£10 per pip per lot). What size? (0.4 lots.)
- Why round position sizes down? (So you never risk more than planned.)
- You’re 6% down with no time limit. Should you double your risk? (No – cut it, or stop and review.)
Key terms
Position sizing · Daily loss limit · Max drawdown · Trailing drawdown · R-multiple · Expectancy · Lot · Stake per point · Correlation
Try this
Take your last 100 demo trades (or your backtest results). Find the longest losing streak. Then, for risk levels of 0.25%, 0.5%, 1% and 2%, work out how far that streak alone would have taken a challenge account down. Mark which risk levels would have broken a 5% daily limit or a 10% maximum loss. Choose the highest risk level that would have survived your worst streak twice over – and write it into your challenge plan.
FAQ
What’s a good risk per trade for a prop challenge? We can’t give a personal recommendation. Many traders use 0.25–1% so that normal losing streaks fit within the rules. Work it out from your own tested results using the steps above.
Should I risk more because it’s not my money? The fee is your money, and so is every reset. The rules are also stricter than most personal accounts, so you usually need to risk less, not more.
Can I use the maximum leverage the challenge allows? You can, but leverage isn’t a target. Size from your stop and your risk per trade.
Disclaimer: This page is general education, not financial or investment advice or a personal recommendation, and it doesn’t take your circumstances into account. Examples are hypothetical, for illustration only, and not an invitation to buy or sell. Learning a strategy doesn’t guarantee profits. Past performance is not a reliable guide to future results. Futures, spread bets and CFDs are complex and carry a high risk of losing money quickly because of leverage, and most retail traders lose money. With a real futures account, losses can exceed your deposit. Prop firm challenges are paid evaluations: the fee is usually lost, and funded accounts are usually simulated. Only trade with money you can afford to lose, and speak to an independent FCA-authorised adviser if you’re unsure. Read our full risk warning.