Get_last_trace() in Husky

What does get_last_trace() in Husky return?

Is it voltage drop, thus more current and more power?

So, higher value 0.5 means more drop than 0.0 and means more power consumption ?

Higher in plot is more power consumption or the opposite ?

Or is it voltage only (not the drop), so higher in plot is less current and this less power consumption ?

What does 0 mean ?

What does -0.5 to 0.5 means ?

What is the math ?

How does integer value relates to float value ?

Best Regards.