I'm currently working on v5 of my Pine Script Programming Course. As a part of it, I'm building a few tools/widgets to help students get the content easier. Here is one of the tools. It's quite basic with it you can select a bar and see all the build-in variables for this bar (Except strategy variables) I hope it will help you in learning Pine Script!
Disclaimer Please remember that past performance may not be indicative of future results. Due to various factors, including changing market conditions, the strategy may no longer perform as well as in historical backtesting. This post and the script don’t provide any financial advice.