Discussing the article: "Engineering a Self-Healing Expert Advisor in MQL5 (Part 3): Restart-Aware Breakeven and Trailing Systems"
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Check out the new article: Engineering a Self-Healing Expert Advisor in MQL5 (Part 3): Restart-Aware Breakeven and Trailing Systems.
Building on Part 2, the implementation introduces restart-aware breakeven and trailing-stop systems for MetaTrader 5. The EA persists the state, such as breakeven activation, last trailing price, and virtual SL in SQLite, then restores them on startup. This preserves dynamic protection flow and prevents lost progress after terminal interruptions.
Breakeven and trailing-stop systems are common techniques for reducing risk and protecting profits during the lifetime of a trade. Unlike fixed stop-loss and take-profit levels, these protection mechanisms evolve as market conditions change.
The challenge appears when a terminal restart interrupts trade management. Although the trade remains open, important runtime information may be lost. For example:
Without this information, the Expert Advisor may resume management using an outdated view of the trade. In this part of the series, we will extend the recovery architecture to persist and restore the dynamic protection state. The goal is to ensure that breakeven and trailing management can continue correctly after a terminal restart instead of starting over from the beginning.
Author: Chacha Ian Maroa