Use Regex to Match Metric Conditions Regex uses all metrics that contain your input value. Typing aws.elb.httpcode.* would match both aws.elb.httpcode_backend_2xx, as well as netuitive.aws.elb.httpcodebackenderrorpercent. Exclude computed metrics using a ^ before the start of a metric name. Use Metric Tags to select a tag to further filter your condition. We recommend testing any regular expressions that you create at https://regexr.com. Match String Match the start and end of the string contained between ^ and $.