Two accounts can have identical drawdown limits and behave like completely different games — because one measures your floor tick by tick and the other only at the close. Miss which model your account uses and you can breach a limit you didn’t even know you were touching.
How drawdown is measured through the trading day
Every prop account has a maximum drawdown — a floor your equity can’t fall below without failing. What separates a survivable account from a treacherous one is when that floor is calculated.
Two things move during the day: your balance (locked-in, closed-trade P&L) and your equity (balance plus the floating profit or loss of open positions). The critical question is which of those the firm watches, and how often it updates your loss limit:
- Does the floor react to live equity, including unrealized gains, moment to moment?
- Or does it only recalculate once, at the daily close, off your settled balance?
That single design choice is the difference between intraday and end-of-day trailing, and it changes how you’re allowed to trade. If you want the mechanics of trailing itself before going further, the trailing drawdown explainer covers the base concept.
Intraday trailing: the floor moves on every equity high
Under intraday trailing, your drawdown floor chases your highest equity point in real time — including profit you haven’t banked yet.
Say you’re up a healthy amount on an open position mid-session. That unrealized peak can ratchet your floor higher immediately. Now the trade pulls back. Your equity falls from the peak, and because the floor already moved up to meet that peak, you’re suddenly much closer to breaching than the closed P&L would suggest.
The trap this creates is specific and brutal:
- A winning trade you don’t close can tighten your own noose. The higher your equity spikes, the higher your floor climbs — even if you never lock the gains in.
- Giving back open profit can breach the limit without a single realized loss on the books.
- Fast, whippy markets punish hesitation, because the floor is recalculating on every tick while you’re deciding whether to take the money.
The defensive habit for intraday accounts is to bank profit deliberately rather than let a big unrealized spike inflate the very floor you then have to stay above. Trailing that follows your equity high is the most aggressive model a firm can run — respect it accordingly.
End-of-day trailing: the floor only updates at the close
Under end-of-day (EOD) trailing, the floor is far more forgiving intraday. It’s calculated off your closed balance and only steps up once per day, at the session close.
The practical effect is room to breathe:
- Intraday spikes in open profit don’t move your floor. You can run a position to a big unrealized high and pull back without the limit chasing you, as long as you don’t breach off realized numbers.
- Your floor resets each day based on where your balance actually settled — so a strong close raises the floor for tomorrow, but a volatile round trip during today’s session doesn’t.
This model is generally kinder to traders who let winners run, because it doesn’t penalize you for unrealized peaks you never captured. It’s still a hard limit — a large realized loss will breach it — but the day-to-day pressure is lower. The two models really are different games:
| Intraday trailing | End-of-day trailing | |
|---|---|---|
| Floor updates | On every new equity high, live | Once, at the daily close |
| Counts floating profit | Yes — unrealized peaks raise the floor | No — only closed balance |
| Main risk | Giving back open profit mid-trade | A large realized loss |
| Rewards | Banking gains quickly | Letting winners run |
Treat the table as the shape of the difference, not a rule for any one firm — the exact behavior is set in your account terms.
Why floating profit can — and can’t — count against you
The whole intraday-versus-EOD question really comes down to one thing: does unrealized profit move the goalposts?
Under an intraday model, floating profit is double-edged. It cushions you while the trade is green, but the moment it lifts your equity to a new high, it can drag your floor up with it — so the same open profit that feels like a buffer is quietly narrowing your margin for error. Under an EOD model, floating profit is neutral to the floor during the session; it only matters once it’s realized and reflected in the closing balance.
This is exactly why the same nominal drawdown “number” is a different constraint under each model. Two accounts might both say the limit is a fixed dollar cushion, yet the intraday one can be breached by a pullback in open profit while the EOD one can’t. Run your own numbers through the prop-firm drawdown calculator under both assumptions and the gap becomes obvious.
Knowing which model your account uses
You cannot trade an account safely without knowing which measurement it runs on — and the answer varies by firm, by product, and by account tier. Futures programs like Topstep and Apex Trader Funding each define their trailing behavior in their rule sheets, and those definitions get revised, so confirm the current version directly rather than trusting an old forum thread.
To pin it down before you risk anything:
- Read whether the floor tracks equity (intraday) or balance (EOD). That one word decides everything downstream.
- Ask whether the trail freezes once you clear the initial drawdown — many accounts stop trailing after a threshold.
- Confirm the reset timing in the firm’s server timezone, not yours.
Once you know the model, the defense is the same principle either way: don’t rely on remembering where the floor is in a fast market. Shibiki tracks your live floor against real broker equity and can enforce a hard limit at the broker so the account flattens before a breach — under whichever model your firm uses. Know the model, size for it, and let the hard limit catch the moment your attention can’t.
Related: Trailing drawdown explained · Prop-firm drawdown calculator · Apex Trader Funding overview