After struggling with a few big power driver demand cars I made a simple little board that lets you create 2 different markers in your logs. It has 2 buttons, 0v 2v, 4v. The input goes to your HPtuners PRO cable's EIO port and is capped and buffed. Doing it this way lets you plot your marks in tables and on line displays. It is really a very simple product but already proven to be super handy in driver demand cars or cars with odd torque management request etc.
Figured other tuners might also find it helpful.
http://www.pcmofnc.com/product/hp-tuners-log-marker/
https://www.youtube.com/watch?v=B6nivOhQ6-0