Most futures prop firms don’t require a stop loss on every trade. A small number do, written directly into the rulebook. And a third group never mentions stop losses at all, then flattens your positions automatically the second you hit the daily loss limit.
That third group is where the confusion comes from. Traders hit an auto-liquidation, assume the firm enforced a stop loss rule, and repeat it. It’s not the same mechanism and the difference costs money.
Stop loss rules by firm
| Firm | Stop loss required? | Applies to | How it’s handled |
|---|---|---|---|
| TradeDay | No | Evaluation + funded | Trailing drawdown is the binding limit, no stop order rule |
| Apex Trader Funding | Yes | All accounts | Every trade needs a pending or mental stop, plus a defined risk approach |
| Topstep | No | Combine + funded | Positions flattened and orders cancelled at the daily loss limit |
| My Funded Futures | No | Evaluation + funded | Daily loss limit caps the session, no stop order rule |
The 3 ways prop firms handle this
1. Written into the rules
Apex is the clearest example, and it’s genuinely unusual. Every trade has to carry either a pending or a mental stop loss, and trading without a defined risk management approach is prohibited outright.
Two supporting rules make it stick. You can’t use your full trailing threshold as an improvised stop, letting the account absorb a large loss until it liquidates. And you can’t pair a tiny profit target with an oversized stop. Apex points to a 5-tick target sitting against a 150-tick stop as the version that won’t pass.
Now, mental stops count. So this isn’t blocked at order entry. It’s reviewed, which means the rule bites at payout time rather than in the moment.
2. Auto-flatten at the daily loss limit
This is what most firms actually do, and Topstep is the standard version of it. No rule requires you to place a stop. Reach the daily loss limit and your positions get flattened, working orders get cancelled, and trading pauses until the next session.
Here’s the thing: that’s not a stop loss. It’s a circuit breaker on the entire account, and it fires at whatever price the market happens to be at. A stop loss is a resting order waiting at a level you chose. Auto-liquidation is a market order at the worst moment of your day. Relying on it as your exit means you’ll routinely get out worse than you planned.
Worth reading how this interacts with your trailing drawdown, because the daily limit and the drawdown floor are separate constraints and either one can end a run.
3. Optional platform enforcement
Some platforms let you impose the rule on yourself. TopstepX has an account-level toggle that attaches predefined stop-loss and take-profit brackets to every position automatically. It’s off by default and you set it per account, so different accounts can run different risk profiles.
Nobody’s forcing you to switch it on. But if your problem is discipline rather than knowledge, a platform-level setting removes the negotiation entirely.
Does it matter when nobody’s forcing you?
Run the math on a $150k account with a $3,000 max daily loss. Trading 5 MES contracts, each point moves $25 across your position. A 50-point adverse move takes $1,250 out of your daily limit, and on a gap open that happens in under a minute with no order sitting there to catch it.
The firms that don’t mandate stops still box you in through other rules. TradeDay’s rulebook is short: day trading only with every position closed at least 10 minutes before the session ends, CME products only, position limits by tier, and a trailing drawdown you can’t breach. Nothing about stop losses anywhere in it.
That 10-minute rule is the one to think about. A stop loss protects you from the market. It does nothing about a position you’re still holding at 4:50pm ET, and no order type saves you from a rule violation. So the trailing drawdown does the risk work at TradeDay, and on a 50k account with $2,000 of intraday trailing drawdown, that floor moves up every time you make a new high. Trade without a stop and you’re handing the drawdown floor the job your order should be doing.
So: nobody requires it at most firms, and it’s still the variable that decides whether you pass the challenge.
Setting one up
On NinjaTrader and Tradovate, attach a bracket at entry so the stop and target go on with the fill rather than after it. ProjectX, which powers TopstepX, handles the same thing at account level if you’d rather set it once and forget it.
Double-check the order type every time. A limit order sitting where you think a stop is means you have no protection at all, and you won’t find out until it matters.
FAQ
Do prop firms require a stop loss?
Most don’t. Apex requires every trade to carry a pending or mental stop loss. Topstep, My Funded Futures and TradeDay have no such rule, though all three cap your downside through daily loss limits or trailing drawdown instead.
Which prop firms have mandatory stop loss rules?
Apex Trader Funding is the main one among major futures firms. The requirement covers all account types and sits alongside rules banning oversized stops against small profit targets.
What happens if you trade without a stop loss on a funded account?
At firms with no stop loss rule, nothing directly. You’ll hit the daily loss limit eventually and the platform will flatten your positions and cancel working orders. At Apex, trading without a defined risk approach is a rule violation in its own right.
Do prop firms require a take profit as well?
No firm mandates a take profit order. Apex does regulate the relationship between the two, since pairing a very small target with a very large stop counts as unacceptable risk management. That’s a ratio rule, not a take profit requirement. It’s separate from the profit target you need to hit to pass a challenge.
Published By Prop Firm App Team