Overview

While items are used to gather system data, it is highly impractical to follow these data all the time waiting for a condition that is alarming or deserves attention. The job of “evaluating” data can be left to trigger expressions.

A trigger may have the following status:

Most triggers are evaluated based on history data, while some triggers for long-term analytics, e.g. trendavg(), trendcount(), etc, use trend data.

You can with different degrees of complexity.