Trailing drawdown explained: prop firm rule definition
By Ken Chigbo, Founder, KenMacro. Published 2026-05-13.
Quick answer
Trailing drawdown is a prop firm risk rule that caps your maximum permitted loss measured from the highest equity peak reached on the account, rather than from the starting balance. As equity rises, the loss limit ratchets up with it, then typically locks once a threshold is hit.
What is trailing drawdown?
Trailing drawdown is a dynamic loss limit used by proprietary trading firms to control trader risk on funded and evaluation accounts. Unlike a static drawdown calculated from the initial deposit, a trailing drawdown trails behind the highest equity or balance point the account has achieved. If equity climbs to a new peak, the floor moves up by the same amount, preserving the original distance between the peak and the breach level. Most firms apply the rule until the account reaches a fixed buffer above the starting balance, at which point the limit usually freezes at the initial deposit level.
How traders use trailing drawdown
Traders on FTMO, MyForexFunds successors, The Funded Trader, Topstep and similar programmes treat trailing drawdown as the binding constraint that defines position sizing. The desk observes that retail traders frequently misjudge the rule by sizing against the starting balance, then discover that an intraday equity spike has tightened the floor before they closed the winning trade. Practical management involves marking the running peak after every closed trade, calculating the live distance to the breach level, and sizing the next position against that figure rather than the original allocation. Institutional risk teams running similar internal rules track equity-peak-to-current spread continuously, often automating alerts when the buffer narrows below a set fraction of daily expected variance.
ASIC, CySEC, and FSA Seychelles regulation. Raw-spread cTrader and MT4 / MT5 execution with some of the tightest EUR/USD all-in costs in the institutional retail tier.
Common misconceptions about trailing drawdown
The most frequent error is assuming the trailing level resets at the end of the trading day. On most prop firm structures, the trail is calculated on closed equity, on running equity including floating PnL, or on the highest balance, and each variant behaves differently. A second misconception is that the limit trails forever. Most firms freeze the level once the account is sufficiently in profit, typically when the peak exceeds the starting balance by the full drawdown amount. A third error is ignoring the impact of unrealised profits, which under equity-based rules can lift the peak before a position is closed.
Browse the full KenMacro glossary
Related from the desk
Frequently asked
What is the difference between trailing drawdown and static drawdown?
A static drawdown is measured from a fixed reference point, usually the starting account balance, and never moves. A trailing drawdown moves upward as the account equity reaches new highs, tightening the distance between the current equity and the breach level. Static rules are more forgiving for traders who build a profit buffer, while trailing rules effectively protect the firm by locking in a portion of any gains made.
Does trailing drawdown follow balance or equity?
It depends on the firm. Some prop firms calculate the trail on closed balance only, meaning floating profits on open trades do not lift the peak. Others use end-of-day equity, and a stricter group uses live equity including unrealised PnL, which means a brief intraday spike on an open position can permanently raise the floor. Traders should read the exact rule text before sizing positions, as the variant materially changes risk per trade.
When does the trailing drawdown stop trailing?
Most prop firms apply the trail until the account profit exceeds the drawdown amount, at which point the breach level locks at the initial starting balance. For example, if the account begins at one hundred thousand with a five thousand trailing drawdown, the trail usually freezes once the balance reaches one hundred and five thousand. After that point, the rule behaves like a static floor at the original deposit level.
How do you avoid breaching a trailing drawdown?
The desk recommends three habits. First, calculate position size against the current distance to the breach level, not the original allocation. Second, take partial profits or close positions before equity peaks lock in a tighter floor, particularly under equity-based variants. Third, reduce size after a strong winning sequence rather than increasing it, because the buffer above the floor often feels larger than it actually is once the trail has ratcheted upward.
Related from the desk
Educational analysis only. Past performance does not guarantee future results. Manage risk against your own portfolio.
Continue reading