Do Prop Firms Require a Stop Loss? The Rules Compared
Short answer: most firms do not require a stop loss on every trade, but a meaningful minority do — and those firms often require it within a specific distance, or require that it not be moved against you. It is one of the few rules where the industry genuinely disagrees, so it has to be checked per firm rather than assumed.
The three distinct stop-loss rules
These get lumped together as "the stop loss rule", and they are not the same thing:
| Rule type | What it says | How common |
|---|---|---|
| Mandatory stop | Every position must have an active stop loss at all times | A minority of firms — more common in futures-style and funded-account products |
| Minimum distance | The stop must sit within a stated distance, or accounts must be seen to risk a finite amount per trade | Rarer, and typically about preventing unbounded risk |
| No requirement | Stops are your own risk tool; the firm only enforces the drawdown limits | The most common position at large FX and CFD firms |
A fourth variant exists on the funded side: some firms require a stop on funded accounts even where the evaluation permits trading without one. As always, read the funded terms as a separate document.
Why firms that do require it require it
The reason is not paternalism — it is exposure. A position with no stop has no defined maximum loss to the firm. On an account with a hard drawdown limit, the platform closes you out at the limit regardless, so the firm's real exposure is bounded anyway. That is precisely why most firms consider a mandatory stop redundant: their own limit already caps the loss.
Where firms do require one, it is usually to prevent a specific abuse: a trader who removes the stop to avoid a small loss and then holds a large one through a gap, forcing the firm to close the account at the limit and destroying the evaluation in a way that generates support disputes. Requiring a stop makes that behaviour a rule breach rather than an argument.
What actually closes your account
Whether or not your firm requires a stop, the mechanism that ends accounts is the daily loss limit, which is measured on equity including floating loss. A trade with no stop is not a rule breach at most firms — it is simply an unhedged position sitting inside a limit that counts it in real time. See how the daily limit is measured.
Can I trade without a stop loss?
At most firms, yes — mechanically. But three consequences follow that traders discover late:
- Floating loss counts immediately. A losing position with no stop eats your daily room from the first tick, not from the moment it hits a level.
- A gap has no floor. Without a stop, a weekend or news gap can move straight through your daily limit before you can act — see news rules.
- It narrows your remaining trading day. Once a large float is open, every other setup you wanted to take is now unavailable, because the room is spent.
So the practical question is not whether the firm requires a stop, but whether trading without one leaves enough room in the day to do anything else. Usually it does not.
Is stop-loss hunting real?
This is one of the most argued topics in prop trading, and it is worth separating two claims:
- "My stop was hit by a wick and then price went my way." This happens constantly and requires no explanation beyond spread, volatility and normal liquidity. It is the single most common misdiagnosis of ordinary trading.
- "The firm's feed is engineered to hunt stops." A serious claim that would require evidence from the feed itself, not just a pattern of unfortunate wicks.
What is verifiable and often mistaken for hunting is spread widening. Stops placed at levels that look fine at 1-pip spreads get triggered when spreads widen around news or the daily rollover, because the ask moved even though the bid did not. That is a real and frequent cause of surprise stop-outs on prop accounts, and it is a liquidity phenomenon, not a targeting of your specific order.
A practical habit: place stops beyond a realistic spread-and-volatility buffer rather than exactly at the structural level, and size so that the extra distance does not breach your per-trade risk cap. That is a position-sizing adjustment, covered in prop firm risk management. The spread mechanic behind most surprise stop-outs is worked through in slippage and spreads.
How to check your firm's stop-loss rule
- Search the terms for "stop loss", not the FAQ or the marketing page.
- Check evaluation and funded separately. The rule often differs.
- Look for a distance requirement. "Within X pips" or "a maximum risk per trade" are the phrasings.
- Check whether trailing stops or manual moves are restricted, and whether moving a stop away from price is treated as removing it.
- Confirm whether pending orders count. A limit entry that fills during a restricted window can breach a stop rule even though you set it up before.
Stop placement versus the drawdown limits
The two rules interact directly, and the arithmetic is worth doing once:
Account: $100,000, 5% daily limit = $5,000 of room. Plan: three setups a day. Maximum risk per trade: about $1,266, including the spread buffer.
That is the number your stop distance and lot size have to obey together. A technically beautiful stop placed at a level requiring $3,000 of risk is not available to you, because two of them breach the day. This constraint — not the stop-loss rule — is what actually shapes position sizing on a prop account.
Frequently asked questions
Does FTMO require a stop loss?
FTMO's rules have permitted trading without a mandatory stop loss, because the maximum daily loss and maximum loss limits already bound the risk. Confirm against the current terms for your specific product, including whether the funded account differs.
Do futures prop firms require stops?
Futures-style firms are the group most likely to require an active stop and to restrict trading without one, partly because index futures gap through scheduled releases and the firm's exposure is harder to bound intraday.
Can I move my stop loss?
Usually yes, with one important caveat: moving a stop further away to avoid being stopped can be treated as trading without a stop, which breaches a mandatory-stop rule. Trailing a stop toward price is normally fine.
Do I need a stop if I have a mental stop?
A mental stop is not an active order. If your firm requires an active stop loss, a mental one does not satisfy it, and the breach is recorded by the platform regardless of your intent.
Is it true that 90% of prop traders lose because of stop hunting?
No. The documented failure reasons are position sizing against the daily limit, oversizing after a loss, and rule breaches — see why traders fail challenges. Spread widening is a real cause of unexpected stop-outs, but attributing losses to deliberate hunting is not supported by anything checkable.
Summary
- Most firms do not require a stop loss; a minority do, sometimes with a distance requirement.
- The funded account may differ from the evaluation — check both.
- Without a stop, floating loss counts against your daily limit from the first tick.
- Spread widening, not stop hunting, explains most surprise stop-outs.
- Size stops against the daily limit, not the maximum drawdown.