How trailing drawdown works, and why it catches traders out
The maximum loss limit decides more prop firm accounts than any other rule. Two accounts can both say "6% max loss" and behave completely differently, depending on whether that limit is static or trailing.
Static drawdown: a fixed floor
A static maximum loss is measured from your starting balance and never moves. On a $100,000 account with a 10% static limit, the floor is $90,000 on day one and is still $90,000 when you are $8,000 in profit. Every dollar you make widens the gap between your balance and the floor, so profits become a cushion.
Trailing drawdown: a floor that follows you up
A trailing limit is measured from the highest point your account has reached, not from where it started. Take a $100,000 account with a 6% trailing limit:
- You start at $100,000. The floor is $94,000.
- You reach $108,000. The floor rises to $102,000.
- You give back $6,000 and fall to $102,000. The account is breached, even though you are still $2,000 in profit. You never lost the firm's starting money; you only gave back gains.
That is the trap. With a trailing limit, your profits don't build a cushion. The room you have to lose stays the same size however well you trade, and it is measured from your best moment.
End-of-day versus intraday trailing
Firms differ on when the high point is recorded.
- Intraday (or equity) trailing follows your open profit as it happens. If a trade is $3,000 up before reversing, the floor may already have moved up $3,000, even if you close the trade for nothing.
- End-of-day trailing only moves at the daily close, based on your closing balance. A trade that runs up and comes back during the day doesn't move the floor. This is more forgiving and is common at futures firms.
Trailing until it locks
Many firms stop the trail once the floor reaches your starting balance. On the 6% example, once you close a day at $106,000 the floor reaches $100,000 and stays there for good. From then on it behaves like a static limit, and your profit above the start is a real cushion. Our firm pages call this "trailing, locks at start".
In our directory, 28 of 50 accounts use some form of trailing maximum loss, and 18 of those stop trailing at the starting balance.
How to trade a trailing limit
- Build the buffer first. Until the floor locks, trade smaller. Getting to the lock point is the hardest part of the account.
- Don't let winners turn into losers. Big open profits that reverse are what tighten an intraday trailing limit. Take partial profit or move your stop up.
- Size from the floor, not the balance. Work out how many losing trades in a row it takes to reach the floor from where you are now. If the answer is under eight, you are risking too much.
- Prefer end-of-day trailing if your strategy holds trades that swing in and out of profit.
See it with your own trades
The fastest way to know if a trailing limit suits you is to replay your own trades against it. Upload a backtest to the test centre and compare trailing and static accounts side by side, or browse prop firms with a static drawdown.