Use a custom trigger when no preset matches what you need. Custom triggers let you build a rule from scratch using a property, an operator, and a value.

When to use a custom trigger

Pick a custom trigger when you need to:

• Watch a specific threshold ("alert me when Buy Box price drops below $15")
• Apply more granular logic ("alert me when number of sellers increases by more than 3")
• Track properties not covered by presets

For everyday monitoring (Buy Box loss, stock-outs, big price moves), a preset is faster — see Triggers & properties.

How to create one

1. Open Apps → Alerts and click Create alert
2. Choose Create custom trigger
3. Pick a property (e.g. Buy Box price, BSR, number of ratings)
4. Pick an operator (e.g. decreases by more than X%)
5. Set a value appropriate for the operator
6. Click Continue, then choose the product (or tag) and the recipient group
7. Save

You can stack multiple triggers in the same alert — the daily email will list each event that fired.

Operators reference

Global operators — work on any property:

• any change