RealtimeHtmlChart is similar to HtmlChart, but in addition to using static data or User Functions,

In addition to Common chart settings, the RealtimeHtmlChart type has the following settings:

• HTML:
  The HTML to display. It is formatted by Bootstrap Framework and can use its available classes (e.g., col-x).
• URLs:
  An array of URLs of valid and CORS accessible file(s) that should contain any JSON valid value (Array, Object, String, etc.). All returned data are then accessible as data[n] in the HTML (using JS/User Functions), e.g., if the first URL returns a string, data0 will contain this string, and if the second URL returns a valid JSON object, this object (and all its properties) will be accessible under data1.
• Refresh Interval:
  Interval (in seconds) in which to reload the data from all URLs.