To use the features of the Excel RTD widget, you need to download the Excel RTD Bridge.
For Microsoft Windows, there is an app which integrates with Excel and which also lets you make websocket and HTTP connections into the Figaro web platform.
Simply download the installation package and run the installer:
For Linux and macOS, there is a Node.js script which lets you make websocket and HTTP connections into the Figaro web platform from almost any programming language/environment - Python, C#, Node.js etc.