text: You can also use Metric Math to create computed metrics and include them in your dashboards. For example, the Status Codes widget below uses Metric Math to calculate the number of 2XX responses which is not available as a metric.
  Once you have handcrafted your dashboard. You can click Actions, View/edit source to see the code behind for the dashboard.
  You can then codify the dashboard as an AWS::CloudWatch::Dashboard resource in a CloudFormation template. You will have to parameterize some of the fields such as API name and region so that the template can be used for different stages and regions.
  As a rule of thumb, you should limit dashboards to only the most relevant and significant information about the health of a system. For APIs, consider including the following: