How do I graph a week-over-week growth rate for a metric on a CloudWatch Dashboard?

The CloudWatch alarm is triggered by the current event and not able to specify certain time of monitoring. Though we can compare or calculate multiple CloudWatch metrics with metric math, it must be the same time range. To achieve the use case, I could imagine the only workaround is to get metrics and calculate by the scheduled scripts, then push to custom metric to trigger CloudWatch alarm. For example, you can coding custom script to collect Cloudwatch metric through AWS CLI, then push to custom metric after calculation. Therefore, the CloudWatch alarm will be triggered by custom metric which you specified.

Meanwhile, I would recommend taking a look at some of our resources that you may find helpful:

• get-metric-statistics[1]
• put-metric-data[2]
• Publishing Custom Metrics[3]

[1] get-metric-statistics - https://docs.aws.amazon.com/cli/latest/reference/cloudwatch/get-metric-statistics.html [2] put-metric-data - https://docs.aws.amazon.com/cli/latest/reference/cloudwatch/put-metric-data.html [3] Publishing Custom Metrics - https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/publishingMetrics.html