Hi @veridian5
I think what you want is possible so long as you are using Grafana OSS (not Cloud) and have enabled / allowed unsanitized HTML scripts. Once that is done, you should be able to write some Javascript code in an HTML panel to use the value you want and then calculate the Speed Required to Reach Target.
I am Jar Jar Binks when it comes to writing Javascript, but there are many Jedi’s floating around different forums that could help you out (if you need help).
Here was my post on something sorta related…Semi-flexible countdown - #4 by grant2