Ask HN: Exposing a live timeseries in a desktop application?

I'm developing a Windows desktop application which produces a timeseries of measurements (position coordinates) and a stream of events.

Most users are going to want a simple count of event totals but I would like to expose the event and measurement streams for customization.

I like how Githooks operate - call a user-defined script every time an event happens.

The other alternative would be a message bus system - events and measurements would be published and the user would hook in by subscribing.

What's the most popular option for something like this? Is any particular bus/messaging system/API a particularly good fit for this application?