Creating new MLB analytics and metrics is nothing new to me. It's an important exercise to take a descriptive stat and work around it in ways that can create something predictive. Especially when it comes to MLB, we need to look to do this frequently to maintain an edge. That being said, below is a video on True AVG, what it is, and how to use it!
The model can be found in any of the MLB True AVG reports on the site and in the Binomial Projection Model. Both are free to view!