Sounds like the solution you seek here will involve a lot more work and architecture than simply telling the app to load data using the microflow timer. You would need to have configurations for each unique set of data you would like to display, some sort of logic to select the next set of data in line, and additional logic to cycle these stored datasets through on a page with the microflow timer, re-retrieveing each set of data and generating the charts in realtime (not a strength of Mendix unfortunately).
Have you considered using an external data charting service such as Tableau and just I-framing in the statistics from there? Could be a more elegant approach
Datagrids have a refresh-attribute:
And for if you need to show data in a different layout: so do Template grids,