Trailing Stop
A stop loss that follows price in your favor and never moves back against you.
Also called: trail stop · trailing stop loss
Written by Javier Sánchez Ros
In plain language
A trailing stop is defined by a distance rather than a fixed price — say $2, or 5%, or one ATR below the highest price reached.
As price advances the stop ratchets along behind it. When price retraces, the stop stays put. It only ever moves in the direction that reduces your risk.
The trail distance is a direct tradeoff. A tight trail locks in gains but gets shaken out by normal noise; a wide trail rides bigger trends but gives back more at the end.
Worked through
A $1.50 trailing stop on a move from $40 to $47
- Entry
- $40.00
- Highest price reached
- $47.00
- Stop ratchets to
- $45.50
- Locked in
- +$5.50 per share
The stop follows the high and never retreats. At $42 it sits at $40.50, at $45 it sits at $43.50, at $47 it sits at $45.50 — and if price then falls back, it stays at $45.50 while the position closes there.
What this solves is the problem of the exact top, which nobody identifies reliably and everybody tries to. The trailing stop does not try. It accepts giving back a fixed amount from the high in exchange for never having to decide when the move is over.
The width is the entire design. Too tight and normal pullbacks — the ones every trend makes — take you out near the start of the move; $1.50 on a stock with an average daily range of $2.00 will not survive a single ordinary session. Too wide and you hand back most of the profit before it triggers.
One thing it does not do is improve your accounting. R-multiples are measured against the original stop, not the trailed one, or a routine trade starts reporting as a five-bagger and the track record stops meaning anything.
Why it matters
A trailing stop converts an open profit into a protected one without requiring you to guess the exact top, which is the part nobody does reliably.
Common mistakes
- Trailing so tightly that ordinary intraday noise closes the trade.
- Starting to trail before the trade has moved far enough to have a profit worth protecting.
- Manually loosening the trail when it gets close, which defeats the entire mechanism.
Keep exploring
These concepts are connected. Understanding one usually makes the next one easier.
A predefined exit that closes a losing trade before the loss becomes serious.
A predefined price where a winning trade is closed automatically.
The average size of an instrument’s price range per period, including gaps.
A stop placed at a multiple of the instrument’s Average True Range rather than a fixed percentage.
The price at which you close a position, whether at a profit or a loss.