Where to start if you need to pull information from the site?

Question

HTML

Example ->> there is a graph on the site and you need to extract this information (numbers, dates, etc.) and transfer it to Excel. Question ->> where to start and what programming languages ​​do you need to know for this task? Thank you.

Answer 1

look towards watir

Answer 2

www.nightmarejs.org
the graph is most likely based on JSON data, use the browser console to study