Trailing drawdown, explained with real numbers
The funded-account rule people underestimate most. Here is how it actually moves, in dollars.
A trailing drawdown is a loss limit that follows your account up. Many prop firm evaluations and funded accounts use one. It sets a floor under your balance, and if your account touches that floor, the account is done.
A fixed floor is easy to respect. What makes the trailing kind tricky is that it moves up when you make money, but it never moves back down when you give that money back.
The basic idea
Say you start a $50,000 account with a $2,500 trailing drawdown. Your floor starts at $47,500. As your account reaches new highs, the floor rises with it and stays $2,500 below the highest point you have reached. It never drops.
- You start at $50,000. Floor: $47,500.
- You make $1,200. New high: $51,200. Floor rises to $48,700.
- You give back the $1,200 and finish flat at $50,000. The floor stays at $48,700.
You ended the day exactly where you started, but your cushion shrank from $2,500 to $1,300.
That is the intraday version. On end-of-day trailing, explained below, the floor only moves on your closing balance, so a flat day leaves it at $47,500.
That is the whole trap. Winning trades you let slip away are not free, because they permanently use up room you will need later.
Intraday trailing vs end-of-day trailing
Firms use two main versions, and the difference matters a lot.
Intraday trailing
The floor follows your equity in real time, and that includes open profit on trades you have not closed yet. If a trade is up $1,200 for a moment and then reverses to break even, your floor already moved up by $1,200. You never banked that money, yet it still cost you cushion.
This version catches out a lot of people who hold winners and hope for more. A big open profit that fades costs you just as much as a closed one you gave back.
End-of-day trailing
The floor only updates once, at the end of the trading day, based on your closing balance. Swings in the middle of the day do not move it. A trade that runs up and fades does not cost you anything as long as you finish the day where you started.
End-of-day trailing is more forgiving during the day, but you still have to respect the floor at every moment: many firms fail you the instant your balance touches it, even mid-session.
| Type | When the floor moves | Counts open profit? |
|---|---|---|
| Intraday trailing | Continuously, whenever equity makes a new high | Yes |
| End-of-day trailing | Once, at the daily close | No, only the closing balance |
| Static (fixed) | Never | No |
When does it stop trailing?
At many firms the trailing floor stops rising once it reaches a set level, often your starting balance or a little above it. From then on it acts like a fixed floor. The exact level and the rules around it change from firm to firm and change over time, so read your firm's current rules rather than relying on a summary, including this one.
How traders usually get caught
- Letting a big winner round-trip. On intraday trailing, the peak of an open trade counts even if you never close there.
- Adding size after a good morning. The floor has already risen, so the same size now has less room.
- Trading the open right after a strong start. Fast markets can move you from your high to your floor in minutes.
- Not knowing where the floor is. If you cannot say your current floor in dollars without checking, you are trading blind.
How to practice it
You can read about trailing drawdown all day, but it only clicks after you watch it move against you. The practical habits are simple to say and hard to do under pressure: know your floor before every trade, take partial profits on runners, and cut size once your cushion is smaller than your usual stop.
Switch a Tapely session to intraday trailing and the floor follows your equity, open profit included, and never moves down, so you can feel this rule bite on a real market day before it costs you a real account. Each session is one trading day. Nothing carries across a multi-day evaluation, and the trail does not stop at your starting balance the way some firms' do.