From the blog "IG Product Updates"

Your Poll vote matters: Hello IG Community! We are working towards making IG trading platform charting developments better to provide a good user trading experience. Why? We strive to provide our clients with the best charts, therefore your feedback is important to us and we will pass on your feedback to our development team.  We would appreciate it if you could take part in the poll as we are continuously working on adding more chart features to our IG trading platform to make y