Check out these caching examples if you need a better understanding of how dashboard cache duration and refresh rate work in Chartio.
Create a pacing dashboard
Pacing dashboards have charts on them to track hypothetical values that are team goals. The pacer data point is defined by you and your team.
Leverage pre-built dashboards
To take advantage of another user's dashboard you can utilize filters and variables to understand and filter the data.
Having Viewer access to a dashboard gives you limited capabilities for dashboard actions but doesn't take away any of the interactive fun.