Passing a challenge doesn't guarantee a payout. Before approving each withdrawal, most prop firms review how you made the money, not just how much. If that review finds a prohibited strategy, the firm can remove the profits, cut your split or close the account, even if you never came close to the drawdown. What catches many traders off guard is that some of these strategies don't look like cheating at all: very fast scalping, opening several positions in the same direction, or copying a friend's trades.
This guide sorts the most common prohibited strategies into seven groups, explains why firms ban them and shows concrete examples from our firm profiles. The goal isn't to scare you, but to make sure you know where the lines are before you put weeks into an account.
Why these bans exist
Almost all prop firm accounts are simulated. The firm pays you a share of the profits you make in that environment because it believes your trading would also work in the real market. Any strategy that makes money by exploiting the simulator, and that couldn't be replicated with real money, breaks that logic.
There's a second reason: risk to the firm. A strategy that turns the challenge into a lottery (putting everything on one trade, for example) can pass by luck, but it doesn't prove skill. The firm wants traders who win repeatedly, not traders who get lucky once.
With those two ideas in mind, the list of bans stops looking arbitrary.
1. Exploiting execution: latency arbitrage, HFT and tick scalping
This is the most universal category. Practically every firm bans:
- Latency arbitrage: exploiting the fact that the firm's server price lags behind another source.
- Delayed or frozen feeds: trading on delayed charts or taking advantage of demo server errors.
- High-frequency trading (HFT): order volumes that overload execution.
- Tick scalping: trades lasting seconds that capture tiny moves slippage would eat in a live market.
AquaFunded sums it up well in its list: platform freezing due to demo server errors, delayed data feeds, tick scalping, HFT, arbitrage bots and reverse, latency or hedge arbitrage.
The tricky part is where legitimate scalping ends and tick scalping begins. Each firm draws the line in a different place, and it's worth knowing yours:
- Blue Guardian treats trades closed in under 2 minutes as tick scalping.
- Hyperticks bans trades held for less than 2 minutes.
- Wall Street Funded bans trades lasting less than 60 seconds.
- Rebels Funding sets the limit at 30 seconds.
- Funding Traders treats trades of 15 seconds or less as HFT.
If you're a scalper, this is the most important fine print at your firm. We have a full guide to prop firms for scalpers where we compare these conditions.
2. Cross-account hedging and reverse trading
This is the second near-universal ban. It means opening a buy on one account and a sell on the same asset on another, whether that account is yours, a friend's or at another prop firm. Whatever the price does, one of the two accounts passes. It's a way of buying the result rather than earning it.
It's important to separate two things that often get mixed up:
- Hedging within a single account: many firms allow it. FunderPro permits it only within the same account. Tradexprop allows hedges and reverse trades within one account. Orion Funded also allows it within one account.
- Hedging across accounts: banned at all of those same firms, and at practically every other one.
Some firms go further. Phidias bans hedging even within a single account on the same underlying, including E-mini against micro (ES versus MES). Halcyon Trader Funding bans hedging the same or related assets and mixing micro and mini contracts on the same asset.
3. All-or-nothing bets and account rolling
This covers strategies that turn the challenge into a lottery. Firms use several names for the same thing: overleveraging, overexposure, one-sided bets, "all or nothing" or "account rolling".
FTMO lists exactly those four: overleveraging, overexposure, one-sided bets and account rolling. Account rolling means buying many accounts and trading all of them with extreme risk, knowing most will blow up but some will pass on statistics alone.
Some firms put numbers on it, which helps you see where the line is:
- forTraders treats all-in trades worth more than 70% of the profit target as gambling behaviour.
- Funding Traders bans trades using more than 30% of margin on a single position, and account rolling that risks everything across several accounts.
- PipFarm bans account churning: buying many challenges to force a random pass.
The simplest way to stay well clear of this category is to always risk a small, constant fraction per trade. We explain it with numbers in how much to risk per trade during a challenge.
The Trading Pit50%
4. Martingale, grids and averaging down
Martingale doubles size after every loss. A grid places staggered orders at different prices. Averaging down (DCA) adds to a position as price moves against you. All three share one problem: they work many times, and when they fail, they fail all at once.
They're banned at a large share of firms. Some examples:
- Audacity bans martingale and dollar cost averaging.
- Goat Funded Trader bans martingale and grid strategies.
- Funding Traders defines grid trading as three or more positions on the same pair in the same direction.
- Funded Futures Family bans excessive averaging into losing positions.
Watch out for the Funding Traders case: placing three staggered entries on the same pair in the same direction, something plenty of traders do to "build" a position, fits its definition of a grid.
5. Copying others, passing services and switching strategy
The firm wants to fund your skill, not someone else's. That's why almost every firm bans:
- Copying signals or accounts from other traders, whether via Telegram, Discord or external copiers.
- "Pass your challenge" services, where a third party trades your account.
- Sharing or reselling accounts.
Fintokei explicitly bans copying trades from other people's signals and using services to pass evaluations. Goat Funded Trader adds a lesser-known rule: switching strategies after the assessment. Core Funded requires your strategy to stay consistent between the evaluation and the funded account.
This doesn't mean copy trading is always banned. Many firms allow copying between your own accounts. The line is copying someone else.
6. News: windows, straddles and oversized positions
Trading the news isn't banned in general, but certain ways of doing it are:
- The5ers bans the news bracketing strategy, which places orders on both sides of price just before a release.
- Funded Futures Family bans straddles and strangles designed to exploit news volatility.
- Tradexprop bans trading news events within 3 minutes before and after.
- Rebels Funding bans excessive position sizes during major news or in the hour before market close.
- BrightFunded lists trading during high-impact news or events.
If your strategy depends on macro data, check these conditions in our guide to prop firms that allow news trading.
7. Futures-specific rules
Futures firms add bans that come from the CME's own market rules:
- Trading near price limits. E8 Futures, Funded Futures Family and FTMO Futures ban opening positions within 2% of CME price limits.
- Spoofing and layering: placing orders you don't intend to fill in order to move the book.
- Multiple limit orders at the same price to game queue priority.
- Excessive volume: TradeDay bans systems generating more than 200 trades in a day.
- Micro scalping: Funded Futures Family requires more than 50% of trades and more than 50% of profits to come from positions held longer than 20 seconds.
If you're coming from forex, these rules may be new. We give more context in our guide to futures prop firms.
A note on EAs and automation
Robots aren't banned in general, but several firms restrict them heavily. Upcomers bans any kind of EA, bot, emulator or automation, even partial (automatic stop management or trade copying), though it allows indicators for analysis. Klein Funding bans EAs and automated systems. Other firms allow your own EAs but ban off-the-shelf third-party ones. If you use automation, check our guide to prop firms that accept EAs.
Grey areas: what is usually allowed
After reading a list like this it's easy to think almost everything is banned. It isn't. These practices are usually allowed, unless your firm says otherwise:
- Normal scalping. Trades lasting several minutes that target reasonable moves are allowed at most firms. What's banned is tick scalping below each firm's threshold.
- Several positions at once. Trading different assets in parallel is normal. The problem starts when you stack so much exposure in one direction that a single headline could take the account down.
- Hedging within one account. As you've seen, many firms accept it. Check yours, because Phidias, for example, doesn't.
- Copying between your own accounts. Many firms allow it, sometimes with limits on the number of accounts or total capital.
- Your own EAs. At plenty of firms they're allowed as long as they're yours and don't generate abusive volume.
- Scaling into a trade in two parts. Usually fine, except at firms with strict grid definitions, such as Funding Traders.
When in doubt, ask yourself one simple question: would this way of trading work the same with real money at a normal broker? If the answer is yes and your risk is reasonable, you're most likely within the rules. If the strategy only works because the environment is simulated, or because another account is offsetting it, you're outside them.
If the firm asks you to explain
Sometimes the risk team asks for clarification before approving a payout. It isn't necessarily an accusation. Reply calmly and with evidence: describe your strategy in a few sentences, attach screenshots of your plan or trade journal if you have them, and explain why certain trades were short or large. A trader who can justify each decision with a written plan has a lot going for them. That's why it pays to keep an organised record from day one, not when the review arrives.
What happens if you get flagged
Consequences vary, but they usually follow a scale:
- Warning. For minor or first-time issues, some firms just warn you.
- Profit removal. Gains made with the prohibited strategy are voided. Goat Funded Futures, for example, deducts profits from trades closed in under 2 minutes.
- Reduced split. Some firms lower your profit split temporarily or permanently.
- Account closure with no refund of the fee.
- A ban on the trader in serious cases, such as coordination between accounts.
Most importantly, the review usually happens when you request a payout. You can trade with a prohibited strategy for weeks without anyone saying a word, and only find out right when you were expecting to get paid.
How to protect yourself
- Read your firm's prohibited strategies section before you buy, not after. Each firm's profile summarises it alongside the rest of the rules.
- Look for concrete numbers. Minimum trade duration, maximum margin percentage, number of positions in the same direction. If your firm gives them, write them into your plan.
- Trade the same way in the evaluation and the funded account. Changing style after passing looks suspicious and, at some firms, is banned.
- Keep risk small and constant. It's the best defence against accusations of gambling or overexposure.
- Don't copy anyone. Even if the firm lets you copy between your own accounts, copying another person is almost always off limits.
- Ask support in writing if you're unsure about a specific strategy. An email answer beats an assumption.
Conclusion
Prohibited strategies share a common logic: the firm wants to pay for skill that would work with real money and can be repeated. Anything that profits from the simulator, buys the result with cross-account hedges or turns the challenge into a lottery is out. If you trade normally, you probably won't have problems, but the details matter: minimum trade duration or the number of entries in one direction can differ from one firm to the next. Check your firm's profile in the comparator before you start, and trade in a way you could explain trade by trade if you were ever asked.
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