This isn't hugely important, but for people that struggle with brake tuning new mods, it'd be nice if someone made an app for individual wheel speed. (If there's better ways of doing this an an unempirical way, please let me know)
The blue one I believe is speed... so you can tell at a glance like a speedometer. Then the grey and green bars I believe are drivetrain torque and brake torque if I remember correctly, but I don't remember which is which.