Creating a visualization creates a snapshot of your source data. To refresh the data from the source, you need to do so on a visualization-by-visualization basis. Follow these steps to update the data in your visualization:
First, use the refresh data button to update the data from the source.
Once your data has been refreshed, you'll get a confirmation message.
Go into the publish menu by clicking 'Publish'. Toggle the public access off for the visualization.
Toggle the public access back on for the visualization. The embed code won't change for your visualization. You will now see updated data anywhere the chart is embedded.
Note: We do plan on allowing paid users to schedule automatic data refreshes, but this is currently not available in Superchart v0.1 ... Sorry ¯\_(ツ)_/¯.