Trading

High-Water Mark: Definition

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Simple Definition

The highest price a stock has reached since you set a trailing stop - the level the trail tracks.

Why It Matters

A trailing stop needs a reference point, and that point is the high-water mark - the peak price reached since the order was placed. The trigger sits a fixed distance below it. Each new high lifts the mark (and the trigger); pullbacks leave it unchanged. Understanding the high-water mark explains why a trailing stop only ever ratchets up: it's anchored to the best price seen so far, never to the current dip. The term comes from the flood marks left on a wall.

Key Points

  • The peak price reached since the order was placed
  • The trailing trigger stays a fixed distance below it
  • New highs raise it; dips never lower it

Learn More

Foundation Lesson

Trailing Stop Orders

Get a complete explanation with examples, key takeaways, and a quiz to test your knowledge.

Related Terms

Common Questions

The highest price a stock has reached since you set a trailing stop - the level the trail tracks. A trailing stop needs a reference point, and that point is the high-water mark - the peak price reached since the order was placed. The trigger sits a fixed distance below it.

A trailing stop needs a reference point, and that point is the high-water mark - the peak price reached since the order was placed. The trigger sits a fixed distance below it. Each new high lifts the mark (and the trigger); pullbacks leave it unchanged. Understanding the high-water mark explains why a trailing stop only ever ratchets up: it's anchored to the best price seen so far, never to the current dip. The term comes from the flood marks left on a wall.

The peak price reached since the order was placed

The trailing trigger stays a fixed distance below it

New highs raise it; dips never lower it