Trailing Stop Order

What is a trailing stop order?

A trailing stop order is a stop order whose trigger updates as the tracked price moves favorably. For a long position, a sell trail rises with new reference highs and remains fixed during pullbacks. For a short position, a buy trail follows new lows and remains fixed during rebounds. The trail distance can be a percentage or a fixed dollar amount.

Choose the trail distance, reference price, eligible session and order duration. A conventional trailing stop releases a market order when triggered. A trailing stop-limit releases a limit order at its own limit price.

Percentage vs dollar trailing stops

A percentage trail scales with the tracked price. Five percent equals $2 at $40 and $4 at $80. A $3 trail maintains a fixed three-dollar distance from the highest reference for a sell trail.

Set the interval from the price structure, ordinary pullback size and spread, then check the trigger the broker stores after each update, since its rounding and reference rules set the exact level.

Managing an open trailing stop

Track the reference high or low, current trigger, remaining quantity and order status. Pair the trail with a profit-taking order through a one-cancels-the-other instruction where the broker supports it: whichever fills first cancels the other.

Compare the stop order and stop-limit order mechanics. When the stock’s trail manages an options position, the options profit calculator shows what the contract is worth with the stock at the current trigger, today or on any later date.

Limitations of trailing stop orders

• Expect the fill to differ from the trigger. A standard trailing stop releases a market order, and the example fills 13 cents below its $44.18 trigger; a gap or fast market can widen that difference.
• Use a trailing stop-limit when price matters more than the fill. It adds a price boundary and can remain unfilled when price gaps past it.
• Set the distance wider than the stock's ordinary pullbacks. A tighter trail can exit on routine noise, while a wider trail gives back more of the gain before it triggers.
• Confirm the broker’s reference price and hours. Brokers trail the last trade, bid, ask, midpoint or another price, and some monitor the trigger only during regular hours.
• Check the order’s maximum life and how the broker adjusts it for splits and dividends before you leave it running for weeks.

Bottom line

A trailing stop sets an exit level that rises with a long position and holds during pullbacks, so the exit follows a winning trade without manual updates. Set the distance from the stock’s ordinary pullback size and spread, confirm the broker’s reference price and sessions, and expect the market-order fill to differ from the trigger in fast markets.