Graph Several Metrics
You can graph several metrics over time on the same graph. For example, you can graph CPUUtilization and DiskReadBytes for an Amazon EC2 instance and show them together on the same graph.
To graph several metrics
Open the CloudWatch console at https://console.aws.amazon.com/cloudwatch/.
In the navigation pane, choose Metrics.
In the CloudWatch Metrics by Category pane, use the Search Metrics field and categories to find a metric using the metric name, AWS resource, or other metadata.
Select the check box next to each metric you want to graph. You can add additional metrics by selecting their check boxes. A line appears on the graph for each check box you select.
To clear your selections and view data for a single metric, choose the metric name in the list.
To save this graph and access it later, in the details pane, under Actions, choose Copy URL, and then in the Copy Graph URL dialog box, select the URL and paste it into your browser.