How does trailing drawdown work?

The short answer

Trailing drawdown is a maximum-loss limit whose floor moves UP as your account makes new highs, but never moves back down. Your room is measured from your highest point, not from your starting balance. That one detail is why traders breach a trailing-drawdown account while they are still in profit on paper.

What “trailing” actually means

Every funded or evaluation account has a Maximum Loss Limit (MLL) — a floor that ends the account if your balance touches it. On a trailing account, that floor sits a fixed dollar amount below your account's high-water mark. As your account rises to a new high, the floor rises with it by the same fixed distance. When your account falls, the floor stays put. It only ratchets up; it never ratchets down.

The practical consequence: profit you make raises the floor permanently, so giving that profit back can fail you even if you never dip below the money you started with.

A worked example (50K account, $2,000 trailing MLL)

These are realistic numbers — a 50K evaluation with a $2,000 trailing max loss is a common configuration across the firms in our catalog. Watch the floor ratchet up and refuse to come back down:

Read the last row carefully. You are flat versus where you started — you have lost none of your original balance — and the account is dead. The $2,000 you briefly earned moved the floor up to your starting balance and left it there. Trailing drawdown punishes giving back profit, not just losing capital.

EOD trailing vs intraday trailing (this is the one that gets people)

Two accounts can both say “trailing” and behave completely differently, because they trail off different numbers. RETICLE's catalog models this distinction explicitly as the basis the drawdown trails on:

Concrete version of the same run: say an open trade spikes your equity to $52,000 unrealized, then you close it at $51,000. On an INTRADAY-trailing account the floor already moved to $50,000 the instant you touched $52,000 — the high-water mark uses your peak unrealized equity. On an EOD-trailing account that intraday spike is ignored; only your closing balance ($51,000) counts, so the floor is $49,000. Same trade, $1,000 difference in how much room you have left, purely because of which number the drawdown trails.

When the trailing floor stops trailing (the lock)

Most firms stop the trail once the floor has climbed back to your starting balance — or your starting balance plus a small buffer (for example +$100). After that point the floor is locked and behaves like a static drawdown: it will not rise further and it cannot be pushed below your starting balance. This is why a strong start matters so much: getting the floor up to its lock point converts a moving target into a fixed one.

Watch for the exception: some platforms (certain Tradovate-backed evaluations, for instance) trail indefinitely with no lock at all. The lock behavior is firm- and platform-specific, so confirm it for your exact account rather than assuming.

Trailing vs static drawdown, side by side

• Static drawdown: the floor is fixed at the start (starting balance − max loss) and never moves. Profit you make and give back does not change your floor. Easier to reason about; you always know exactly where the line is.
• Trailing drawdown: the floor chases your high-water mark upward and locks in your gains as new, higher floors. You can fail it while still up on your starting balance. Requires you to track your peak, not your start.

Why this is an evaluation-killer

The failure is rarely a single big loss — it is psychological and arithmetic. Traders track their starting balance and their realized P&L, because that is how a normal brokerage account feels. Trailing drawdown is measured from the peak, and on intraday accounts from the peak of unrealized equity. So the dangerous moment is not when you are down; it is right after you have been up and started giving it back, while your brain still says “I'm green, I have room.” You do not have room. The floor moved.

How to not blow an eval on it

• Find out your exact drawdown type before you trade: EOD trailing, intraday trailing, or static. Do not guess.
• Track your trailing floor live, not your starting balance. The relevant number is (your high-water mark − your max loss), updated as you make new highs.
• On an intraday-trailing account, treat unrealized spikes as real: a peak you touch on an open trade and give back has already raised your floor.
• Respect the lock: getting the floor up to its lock point early turns a moving line into a fixed one. After that, normal pullbacks stop threatening the account.
• When you are giving back profit, the account is at its most dangerous — not when you are simply down.