Trailing drawdown is a moving floor on your prop firm account balance that follows your balance upward but never comes back down. If your account hits a new high, the floor locks in at a new, higher level. If your balance ever drops below the locked-in floor, the account is violated and closed. This mechanic exists to prevent traders from hitting one big day and then slowly giving it all back. It is also the single largest cause of blown evaluations on Apex, Topstep, and MyFundedFutures. Understanding exactly how the floor moves — and whether it moves at end of day or in real time — is the difference between passing an evaluation and losing the account on a technicality.
A third-party explanation of trailing drawdown mechanics. Watch this first for visual context, then read the detailed breakdown below.
If you ask ten funded prop firm traders which rule blew their first evaluation, nine of them will say some version of "I did not understand the trailing drawdown." Not the profit target. Not the daily loss limit. Not the consistency rule. The trailing drawdown. It is the single largest killer of prop firm evaluations and it is also the most misunderstood mechanic in the entire rule set because it does not work the way most traders intuitively expect.
This guide explains exactly how trailing drawdowns work, the difference between the EOD and intraday variants, the math behind the trap that blows most accounts, and the exact rules for Apex, Topstep, and MyFundedFutures in 2026. Read it carefully. If you are about to take your first prop firm evaluation and you do not understand this mechanic intuitively, stop and learn it first — it is cheaper to spend an hour reading than to spend $200 on an evaluation you will blow on the second day.
Let's walk through a concrete example using a 50K account with a $2,500 trailing drawdown — this is the typical Apex 50K evaluation setup.
At the start, the floor sits at $47,500. If your balance ever drops to $47,500, the account is violated. You have $2,500 of room to lose before hitting the floor.
Say you make $800 in profits on day 1 and close the day at $50,800. With an EOD trailing drawdown, the floor now moves up:
The floor moved from $47,500 to $48,300 — an increase of $800, matching the profit you made. You still have the same $2,500 of room below your current balance, but the absolute floor has moved up. The protection scales with your success.
On day 2 you lose $400 and close at $50,400. With an EOD trailing drawdown, this is where the mechanic gets interesting. The floor does NOT move down. It stays at $48,300 (the level it reached after day 1). Your new situation:
You still have $2,100 of room before hitting the floor — but that is less than the $2,500 you started with. The floor has "trailed" your high balance and now sits closer to your current balance than it started. This is the "trailing" part of trailing drawdown.
Now imagine a chain of events that blows accounts. Day 1: you make $800, floor trails to $48,300. Day 2: you make another $600, floor trails to $48,900. Day 3: you hit a big day and make $1,500, floor trails to $50,400. At this point your account balance is $52,900 and the floor is at $50,400.
Day 4: you have a bad day and lose $2,000. Your closing balance is $50,900. You are still above the $50,400 floor by $500, so the account survives. But now notice — if you had stopped on day 3 at $52,900 and never lost a dollar, your account would have been healthy. Because you made and gave back profits, your remaining buffer collapsed from $2,500 to just $500.
Day 5 you lose another $600. Your closing balance is $50,300. That is below the $50,400 floor. The account is violated and closed. You passed the profit target, you never had a single catastrophic day, and you still lost the account because the trailing floor was too close to your balance when you had a modestly bad session.
The example above used EOD (End of Day) trailing drawdown, where the floor only updates once per day based on your closing balance. Intraday trailing drawdown works differently — and much more strictly.
With EOD trailing, the floor only moves at market close. During the day, you can have unrealized profits — say you are up $1,500 at noon — but if you give back those profits before close and end the day at $50,500, the floor only sees your closing balance of $50,500 and only moves up by the $500 you actually kept. The intraday peak of $1,500 is irrelevant because the floor never saw it.
This is meaningfully forgiving. It means you can have volatile trading days where you swing wildly in profits without permanently locking those peaks into the floor. Many traders specifically pick EOD accounts because they know they tend to give back profits during the session and want the floor to only care about where they finish, not where they peaked.
With intraday trailing, the floor updates in real time every single moment your account balance ticks higher. If you are at $50,000 at 9:30 AM and your account briefly hits $51,500 at 10:15 AM (because of unrealized profits on an open position), the floor immediately locks in at $51,500 - $2,500 = $49,000 — even if you never closed that position. You then give back the profit and close the day at $50,200. The floor is now $49,000 and you have $1,200 of room.
Compare this to the EOD version of the same scenario. The EOD floor would have only seen your closing balance of $50,200, and the floor would have moved up by the $200 you actually kept — to $47,700. You would have $2,500 of room instead of $1,200.
That single difference — $1,300 of additional drawdown buffer after one volatile day — is why intraday accounts blow up so much more frequently than EOD accounts. The intraday version punishes you for having unrealized profits that you did not keep.
Apex offers both EOD and Intraday trailing drawdown as separate account types. You pick at purchase and cannot change it later. The drawdown amounts vary by account size — a 50K account has a $2,500 drawdown, a 100K account has a $3,000 drawdown, and a 150K account has a $4,500 drawdown.
After passing the evaluation and moving to a Performance Account (PA), the drawdown locks in permanently at a specific level: the original drawdown plus a $100 "safety net." Once the PA is activated this floor never moves again (it does not trail on PAs the way it does on evaluations). This is why passing the evaluation is the hard part — once you are on the PA, the drawdown is static and generally easier to manage.
Topstep uses an EOD trailing Max Loss Limit (MLL). The amounts vary by account: a 50K account has a $2,000 MLL, a 100K has $3,000, and a 150K has $4,500. Topstep's trailing MLL only updates at end of day, so it behaves like Apex EOD rather than Apex Intraday.
Topstep also has a separate Personal Daily Loss Limit (PDLL) that is user-configurable and dynamic. This is not a trailing drawdown but a daily hard stop that you set yourself. It is in addition to the trailing MLL. Topstep traders need to track both numbers separately.
MyFundedFutures is the only firm with meaningfully different drawdown mechanics across its plan tiers:
The key trap on MyFundedFutures is picking the Rapid plan without understanding that it uses intraday trailing. Many traders pick Rapid because it has the best profit split (90/10) without realizing that the intraday drawdown mechanic is stricter than anything Apex or Topstep uses. Read the MyFundedFutures rules guide for the full details on each plan.
All MyFundedFutures plans also lock the drawdown at starting balance plus $100 once you reach funded — similar to Apex's safety net mechanism.
The most common misconception is that trailing drawdown is just a max loss of some dollar amount from your current balance. It is not. It is a floor that ratchets upward. The current distance between your balance and the floor is not your original drawdown amount — it is whatever the gap is after the floor has already moved up. Always know your current floor level, not the original drawdown amount.
On Apex Intraday and MyFundedFutures Rapid, the floor moves during the session. If you are not actively tracking where it is right now, you can find yourself closer to the floor than you realized because of unrealized profits you gave back. A good copier or journal shows you the current floor level at all times. Without that, you are trading blind on the one number that determines whether your account lives or dies.
On days with big intraday swings, the floor can move a lot on intraday accounts. A trader who sees their account up $1,500 at 10 AM and thinks "I'm in good shape" does not realize that the floor just locked in 1,500 higher and their cushion is unchanged. The swing did not help them — it just reset the game. Plan your risk based on the floor, not based on the peak.
A trader gives back profits during a session, sees the floor is now close to their current balance, feels panicky, and starts taking aggressive trades to rebuild the buffer. This is the exact behavior that blows accounts the fastest. The aggressive trades produce more losses, which push the balance closer to the floor, which triggers more aggression. The spiral is predictable and the account is usually dead within 2 to 3 hours. The correct response to a low buffer is to stop trading for the day, not to trade harder.
Position sizing should be a function of your distance from the floor, not a function of your strategy's "normal" size. If your normal size gives you a 1R risk of $500 but you only have $1,200 of room above the floor, taking that normal size is gambling with 40% of your remaining buffer on a single trade. Size down when the buffer is thin. Size up when the buffer is healthy. The floor proximity is the single most important input to sizing decisions on prop firm accounts.
Write it down before every session. Your floor is wherever it was after the last close (for EOD) or wherever it has ratcheted during the session (for intraday). If you cannot answer "what is my current floor" in under 5 seconds, you are flying blind.
Do not trade down to the actual floor. Set a personal rule that you stop trading whenever your balance gets within 20% of the floor. On a $50K account with the floor at $48,300, stop if you drop to $48,700 ($400 above the floor, which is 20% of your original $2,500 buffer). This personal buffer gives you margin for error and psychological breathing room.
Your position size should scale down as your buffer shrinks. If your normal size is 2 contracts and you have half your normal buffer left, trade 1 contract. If you have 25% of your buffer left, stop trading entirely until the session ends. The math is simple: smaller positions create smaller losses, and smaller losses preserve the buffer longer.
On Apex Intraday or MyFundedFutures Rapid, any profit you give back permanently moves the floor closer to your balance. The rule here is: once you reach a profit peak during the session, strongly consider stopping for the day. Trading for more after a peak is almost always a losing expected value because every incremental win is offset by the fact that every incremental loss is now more expensive in terms of floor proximity.
If you run multiple prop firm accounts with a copier, each account has its own floor and they may be at very different distances from violation. A good copier or journal tracks each account's floor independently and shows you the per-account status. Tradecovex does this automatically for every connected account and is specifically built around the 2026 trailing drawdown mechanics across all three major firms.
Trailing drawdown is the single rule that separates traders who understand prop firms from traders who think they understand prop firms. Almost every trader who blows an evaluation blows it because the trailing floor caught them — not because they took one catastrophic trade. The floor is the mechanic that turns modest gives-back into account violations.
The good news is that understanding the mechanic is most of the battle. Once you internalize that the floor ratchets up but never comes down, that your real cushion is the distance between your current balance and the current floor (not your original drawdown amount), and that profits you give back permanently reduce your buffer on intraday accounts — you will naturally trade in a way that respects the rule.
The traders who pass evaluations consistently are not the ones with the best setups or the biggest edges. They are the ones who know exactly where the floor is at every moment and trade accordingly. Learn the mechanic before your next evaluation. It is the highest-ROI hour you can spend as a prop firm futures trader.