Two prop accounts advertise the same "10% maximum drawdown." A trader assumes they are interchangeable, picks whichever is cheaper, and gets blindsided weeks later when a perfectly ordinary red day breaches an account that is still in profit overall. The headline number was identical. The mechanic underneath was not. Trailing versus static drawdown is the most consequential rule most traders never bother to check, and it decides how you are allowed to behave the moment you stop being flat.
Static drawdown: a floor that stays put
A static maximum loss is anchored to your starting balance and never moves. Begin with a 100,000 dollar account and a 10% static limit, and the floor sits at 90,000 dollars for the entire life of the account. That is it. It does not care how much profit you make.
The consequence is that your usable room grows as you win. Push the account to 106,000 dollars and you now have 16,000 dollars of space above the floor, not 10,000. A static limit rewards traders who build a cushion early and then have the freedom to trade more assertively against profit they have already banked. It is the more forgiving of the two by a wide margin, and it is why many traders specifically seek out static-floor evaluations.
Trailing drawdown: a floor that chases you
A trailing maximum loss follows your account upward. As you make new highs, the floor rises behind you, keeping a fixed distance beneath your peak. Start at 100,000 dollars with a 10% trailing limit and the floor begins at 90,000 dollars, the same as static. But push the account to 106,000 dollars and the floor trails up to 96,000 dollars. Your room did not grow. It stayed at roughly 10% of your peak, and the giveback you are allowed is now measured from a higher point.
Read that again, because it is the part that catches people. On a trailing account, making profit does not buy you breathing space, it moves the floor up under your feet. The better you do, the tighter the limit sits behind your best moment. This is why traders breach trailing accounts while still showing an overall profit: they are up on the account but down from their peak by more than the trailing distance allows.
Two flavours of trailing, and one is far nastier
Not all trailing limits trail on the same thing, and the difference is brutal.
End-of-day trailing updates the floor based on your balance or equity at the close of each trading day. Intraday spikes do not move it. This is the more manageable version, because the floor only ratchets once per day on settled numbers.
Intraday, or real-time, trailing updates the floor against your highest equity point reached at any moment, including unrealised profit on open trades. This is the one that ambushes people. Suppose a trade runs 3,000 dollars into profit, the floor ratchets up to chase that unrealised peak, and then the trade retraces and you close it flat. You made nothing, but the floor stayed up where your unrealised high dragged it, and you are now 3,000 dollars closer to a breach than when you opened the trade. You can lose an account without ever booking a losing trade.
If a firm uses intraday trailing, taking partial profits and not letting winners balloon in unrealised terms before you bank them becomes a survival mechanic, not a preference.
When trailing stops trailing
Many firms cap the trailing behaviour so it does not chase you forever. A common design lets the floor trail upward only until it reaches your initial starting balance, at which point it locks and becomes static from then on. In our example the floor would trail up until it hits 100,000 dollars, and once your account has climbed enough for that to happen, the limit stops moving and you have effectively converted to a static floor for the rest of the account's life.
This matters enormously for how you plan the early stage. On such an account the dangerous period is the beginning, before the floor locks, when every new high tightens the limit behind you. Get past the lock point and the account becomes far more forgiving. Knowing exactly where your firm's trailing limit locks, and whether it locks at the starting balance or somewhere else, tells you when you can loosen up and when you cannot.
How the two floors change your actual trading
The drawdown type should visibly change your behaviour, especially just after you go green.
On a static floor you can bank a cushion early and then treat your risk budget as your starting room plus banked profit. A drawdown after a strong run costs you space you genuinely earned, and the floor never sneaks toward you.
On a trailing floor profit is not a cushion, it is a moving target that pulls the floor up. You have to protect your peak equity, not just your balance. Giving back a large open profit is as dangerous as taking a real loss, sometimes more so on an intraday-trailing account.
This is also why the drawdown type interacts with the daily limit in ways that end accounts. A trader watching only the daily allowance can breach a tight trailing floor long before they use up the day's room, because the two limits are measured from different reference points. The daily versus max drawdown mechanics are worth reading alongside this, because the trap lives in the interaction between them.
Check this before you check the price
When you compare evaluations, the drawdown type belongs above the profit split on your checklist. Two accounts with the same 10% headline can be a gentle static floor or a savage intraday trailing one, and you will not know from the marketing. The choice between firms often comes down to precisely this, because different firms and different account tiers within the same firm use different mechanics. Find the exact wording, work out where your floor sits after a winning trade, and only then look at the fee.
The cleanest way to internalise the difference is to feel it. Trade a stretch in replay under a static floor, then trade the same stretch under a trailing one, and watch how differently you have to treat a winning position when profit moves the limit up behind you. TradeSave+ prop-firm account journals track your live distance to the max floor as trades close, which is the number that exposes a trailing limit for what it is, since you can watch the room shrink even as your balance grows.
The rule in one line
Static drawdown gives you more room as you win. Trailing drawdown takes it back. Same percentage on the label, opposite behaviour in practice, and the traders who fail on trailing accounts are almost always the ones who assumed it worked like a static one. Check which you are trading before you place a single order, and let the answer change how you handle a winner. If you want the full survival plan built around these limits, the guide to passing a challenge puts them to work.