Repair Once: how it works and how to use it safely

Repair Once runs its action one time per entry cycle. It is not a continuous monitor. Using it wrongly is a common reason strategies behave unexpectedly.

The lifecycle

1. Entry is taken. The set meets its entry conditions.
2. Repair Once fires. Its condition becomes true and the action runs once.
3. The set exits through its exit conditions (stop-loss, target, time, and so on).
4. The cycle resets. Repair Once can fire again only in the next entry cycle.

Several Repair Once conditions in one set

• Each one fires once per entry cycle, independently.
• If any of them brings the set’s active quantity to zero, the engine stops checking all remaining repair and exit conditions and goes back to checking entry conditions only.
• So the other Repair Once conditions never get a chance to run in that cycle.

The mistake to avoid: exiting the full quantity with Repair Once

If Repair Once exits the whole position:

• Active quantity becomes zero and the engine looks for the next entry.
• No proper exit happened, so the Repair Once counter does not reset.
• On the next entry, the Repair Once condition will not fire again.

The strategy works on the first trade and breaks on every re-entry.

Good uses for Repair Once

• Adjusting position size after a threshold is crossed.
• Adding a hedge leg once.
• A per-leg stop-loss or Leg TSL (one Repair Once block per leg).

Handle the full exit with exit conditions, especially in strategies that re-enter. If you need an action to fire every time its condition is true, use Repair Continuous and make sure the condition resets after each fire.

Quick reference

Edited with AI from the original Tradetron article, checked against current docs (Oct 2026). Spot something wrong? Tell us in the Community.