Threshold alerts
Get pinged in Slack when a number on a card crosses a line.
Chart, table, and KPI cards can carry alerts. An alert is a condition on the card's value and a destination for the notification.
Ping me when weekly churn goes above 5%Edge-triggered, not level-triggered
An alert fires on the crossing, not on every refresh while the condition holds. A metric that sits above its threshold for a week produces one notification, not one per refresh.
This is the difference between an alert you keep and an alert you mute.
Delivery
Alerts deliver to Slack. Connect your account first. See Slack account linking.
Choosing a threshold
The refresh interval bounds how fast an alert can fire. An alert on a card that refreshes daily cannot tell you about a spike at 10am, no matter how the condition is written.
Alerts depend on refresh
An alert on a card whose refresh script is failing will never fire: the value never changes, so it never crosses. Card health surfaces this; see dashboards.