Automatically update data on chart

The option is there in the formatting section, But It's available only if the data is being fetched from the Database.

Okay, thanks for the information. Only I get so no database connection to Google Anlaytics. Then I have to generate that somehow different.

Can I create an API interface that gets the data from another external tool?
There would even be a data connection available.

If you get the data in supported formats, yes you can do that.