Creating an Alarm from a Default Metric Chart
Create an alarm based on the predefined service query used to generate a default metric chart. Default metric charts are available on the Service Metrics page and under Metrics on resource details pages in the Console.
To create an alarm from the metric chart on the Metrics Explorer page instead, see Creating an Alarm from a Custom Metric Chart. To start from the alarm page, see Creating a Basic Alarm.
For alarm troubleshooting, see Troubleshooting Alarms.