Implementing a Parabolic SAR Trailing Stop in an MQL5 EA

Summary

This article explains how to use Parabolic SAR values as candidate Stop Loss levels in an EA’s trailing-stop logic. The indicator is created with configurable timeframe and parameters; its value, typically read from a completed bar, is passed to a trailing function that filters positions by symbol and magic number. The EA checks whether a stop should move, then applies server distance limits and other constraints before modifying it. The article also describes calling the logic on ticks or when a position opens and releasing the indicator handle when the EA shuts down.

The approach is intended to keep a protective stop following a trend and can be adapted to other indicators or custom level calculations. The text notes that SAR can cause early exits in flat or low-volatility markets. It offers implementation steps and invites readers to test variations, but the excerpt provides no comparative performance study or quantified evidence that this trailing method improves results.

Key ideas

• Parabolic SAR can supply candidate Stop Loss levels for an EA’s trailing logic.
• The trailing function should filter positions by symbol and, when specified, magic number.
• Stop changes must satisfy broker distance restrictions and move only when the new level improves the existing stop.
• Parabolic SAR may cause premature exits in flat or low-volatility conditions.
• The trailing framework can accept levels from other indicators or custom calculations.

Tags

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.