This might the final iteration of this True Strength Index indicator. The prior public released version omitted the oversold and overbought levels. I was in disagreement with the concept of how the oversold and overbought lines were used with the original specifications of how these lines are just set at -30 and + 30. To put it bluntly, it's like plopping 2 additional lines fixed at -30 and +30 and calling it oversold and overbought.
After several hours of brainstorming and experimentation, I think I came up with a better solution to the oversold and overbought levels. You can read the description comment area of the source code (released publicly) for more information on how to use the oversold and overbought lines. The oversold and overbought lines aren't enabled by default, so if you want it, ensure you manually enable it.
Also, after a while, my source code started getting a bit sloppy as I kept getting frustrated with wanting to terminate each line of code with a semicolon, etc... since I've come from a C++, Javascript/NodeJS background. In any case, this version also comes with a couple of minor changes. You can check it for yourself through the indicator settings and each setting has a detailed tooltip to assist you.