I use multicharts with AMP and CQG feed. The user manual is 934 page long PDF. There are many, many videos on Youtube. Yet, still, I don't find it particularly user intuitive. It may well be on account of my age and the type of charting, trade page, etc that I used many years ago.
I will tell you this, though, the program keeps up with the feed, which is all I need. I always run at least 2 feeds from different sources on different computers, because I don't trust anybody, and amp/cqg/Multicharts is always fastest.