Dynamic Thresholds is now available in public preview, providing a significant enhancement to Azure Monitor Metric Alerts.
With Dynamic Thresholds you no longer need to manually identify and set thresholds for alerts. The alert rule leverages advanced machine learning (ML) capabilities to learn metrics’ historical behavior, while identifying patterns and anomalies that indicate possible service issues.
To start using it, just access the resource(s) you are monitoring and access the Alert configuration blade (as shown below for a virtual machine)
Create (or edit existing) an alert rule and at the Condition level set the Alert logic to Dynamic (preview)