Maximum Risk per Trade Rules

A maximum risk per trade rule caps how much of the account you may lose on a single trade or trade idea, commonly 1% to 2% of the starting balance, and some firms also require a stop loss on every position. Firms without a fixed cap often keep a broader right to act against gambling, meaning positions far larger than your normal trading. Breaking these rules can cost the profit on the trade, part of your profit split or the account itself.

How maximum risk rules work

Most accounts already limit risk through the daily loss limit and maximum drawdown. Risk per trade rules add a limit on a single decision, so that one trade cannot use up most of the account’s room. They come in several forms.

• Risk per trade idea. The potential loss from entry to stop loss may not exceed a set percentage of the starting balance. Firms often group several entries on the same instrument, in the same direction and within a short time, into one trade idea, so adding to a position counts towards the same cap.
• Mandatory stop loss. Every trade must carry a stop from the moment it is opened, because risk cannot be measured without one.
• Open or floating loss caps. The combined unrealised loss across open trades may not exceed a set amount at any moment. Some firms close all positions automatically when it is reached.
• Relative rules. Instead of a fixed percentage, the firm compares a trade with your own history, such as a largest loss that may not exceed a multiple of your median winning trade.
• General gambling clauses. Terms that let the firm act against positions that are substantially larger than your usual size, even if no number is published.

The rules exist because a trader who passes an evaluation with one or two very large trades has shown luck rather than a repeatable process. For the same reason, many firms pair these rules with a consistency rule, covered in prop firm consistency.

Worked example

A trader has a made up $100,000 example funded account at an imaginary firm. The firm caps risk per trade idea at 2% of the starting balance, which is $2,000, requires a stop loss on every trade, and treats any new entry on the same instrument in the same direction within ten minutes as part of the same idea. On EUR/USD one standard lot is worth about $10 per pip.

The first entry was sized correctly: $2,000 divided by $300 of risk per lot allows 6.66 lots, rounded down to 6.6. The second entry was also modest on its own, but it came six minutes later on the same pair in the same direction, so the firm counts both as one idea with $3,180 at risk. That breaks the cap, even if both trades end in profit. Had the second entry come twenty minutes later, it would have been a separate idea, although the combined open risk would still have used more than 3% of the account.

Two more details matter. The cap is measured on the starting balance, so if the account grows to $108,000, the limit is still $2,000 rather than $2,160. And spread, commission and slippage sit on top of the stop distance, so a trade sized at exactly $2,000 can exceed the cap once costs are added.

How firms differ

The rules below are those published by each firm in September 2026. Firms change them often, so confirm the current version before you buy.

Hola Prime requires a stop loss on every trade on funded accounts and caps the risk on any single trade idea at 2% of the starting balance; a breach ends the account. Hola Prime Futures applies a mandatory stop loss and a 2% cap on Tradovate, NinjaTrader and WealthCharts (1% on DX Futures), and counts a new entry on the same asset in the same direction within ten minutes as part of the same idea. Exceeding it terminates the account.

Blueberry Funded sets a risk per trade idea cap of 1% on Flex 1 Step accounts and 1.5% on funded 1 Step and instant accounts, while its Prime accounts have no cap.

Some firms cap open losses instead. Hantec Trader breaches a funded account whose combined floating loss reaches 3% of the starting balance, or 1% on Instant24 and Instant Lite. Blue Guardian uses an automatic Guardian Shield on funded Standard and Instant accounts that closes all trades at a set floating loss, 1% on Instant accounts, and the first trigger permanently cuts the profit split to 50%. The Trading Pit sets a maximum loss per position on CFDs Instant accounts of 1% on $5,000 to $20,000 accounts and 0.5% on $50,000 and $100,000 accounts, according to its challenge builder.

FundedElite bars funded traders from risking more than half of the daily loss limit on one instrument in a single day. YLOS Trading uses a relative test on funded Standard and No Activation Fee accounts: the largest loss may not exceed five times the median winning trade, alongside a check for sudden changes in contract size.

FTMO publishes no fixed percentage, but its forbidden practices include opening substantially larger positions than your other trades, which is the general form of a gambling rule.

Common mistakes

• Sizing from the current balance. Most caps use the starting balance, so a growing account does not earn a larger limit.
• Adding to a winner or a loser too quickly. Extra entries within the firm’s grouping window join the original idea, as the example shows.
• Leaving out costs. Commission, spread and slippage add to the loss if the stop is hit. Size a little below the cap.
• Opening a trade before setting the stop. At firms that require a stop loss, a trade without one can be a violation however small it is.
• Widening the stop after entry. Moving a stop further away increases the risk on the idea and can push it over the cap mid trade.
• Going large to finish a challenge. A final oversized trade to reach the target is exactly what gambling clauses and consistency rules target, and it can also break the daily limit. The habit is discussed in what counts as overtrading.

How to trade within risk per trade rules

Size every position from the stop, not from a feeling about the trade. The calculation is the cash risk divided by the stop distance multiplied by the value of one pip or tick. With a $1,500 budget and a 25 pip stop on a pair worth $10 per pip per lot, the position is $1,500 divided by $250, or 6 lots. Many traders set their working limit at three quarters of the firm’s cap to leave room for costs and slippage.

Place the stop with the order, keep a note of the time of each entry so you know when a new idea begins, and total the risk of every open position before adding another. Correlated positions, such as two dollar pairs moving together, behave like one larger trade even when the firm counts them separately. The broader framework is set out in how professional traders manage risk and funded account risk management, and a written trading plan is the easiest place to fix these numbers in advance.

Check what happens if you break the rule. Some firms close the positions and continue, others cut the profit split or end the account; the difference is explained in soft breach vs hard breach. A risk cap also works alongside the account’s overall floor, so the end of day drawdown guide is useful context. How firms review trades for oversized positions is covered in how prop firms detect rule violations, and every rule topic is in the prop firm rules hub.

Checklist

• Is there a fixed cap per trade or per trade idea, and is it measured on the starting balance?
• How does the firm group entries into one idea?
• Is a stop loss required on every trade?
• Is there a cap on combined floating loss, and does the firm close trades automatically when it is reached?
• Does the firm use a relative test, such as a median rule?
• Does the rule apply in the evaluation, the funded account, or both?
• What is the consequence: closed trades, a reduced split or a closed account?