Datadog - getting the amount of used space on a device from email alerts?

With an email alert is there anyway to show the amount of used space on a device? I tried using {{|system.disk.in_use}} in the email template but when i send the test email it does not show any number. This is for a linux AWS instance.

In metric based query monitors, you’ll want to use the variable {{value}} which will provide the value of the metric that breached the alert threshold.

You can find this, and other useful variables for alerting documented here: