The definition of an Insight, whether a chart, table, map, or other type of insight, can be easily copied. This allows you to use one definition as a starting point for a new one. The process is simple.
1) Select the insight you want to copy from the Available Insights list
2) Click Create a Copy from the Selected Chart menu.
After clicking Create a Copy, you will have the option to give a name to the new, copied, version of the Insight. Change the name or add a description as you wish, click OK, and you will be taken to the Edit dialog for the new Insight.