You can show most recent data by setting the chart to refresh at regular intervals automatically. Every time the chart loads, it fetches data from the source allowing you to show last updated data using.

We have Live Sales Data chart that shows the sales amount generated by different agents.

We will set this chart to refresh every 10 seconds so that the viewers can get latest sales data.
Here is how to do this:

• Click the Web Part Menu icon at the top right corner of the chart.
  
  
  
• Click on Edit Web Part.
  
  
  
• Edit Web Part pane opens on the right side.
  
  
• Check Auto Refresh Chart option. Set Refresh Interval (seconds) as 10.
  
  
  
• Click Apply. Click OK.
• Save the page.

The chart will refresh every 10 seconds, fetch the latest data from the data source and plot them.