Hi Steyn Viljoen! When I created Chart, I kept in mind that designers don’t want to create JSONs or learn API to use real data in Sketch. Because of it, Chart supports only pasteboard and random data.
But I see that many of frontend designers want to use APIs and JSONs with Chart. Can you write me on email@example.com: what you want to Chart can do to help in your work?
Have you thought about ‘binding’ a live chart to a .json file or csv file? So you can update the contents of the file, then hit the update command on the chart object in sketch. This way you can save your chart data next to your sketch file