Spark Advance setting between 2-4k and 4-7k on a Diablosport

[fxstc69]

Predator part number #116039
2006 Ford Mustang V6 4.0L

My question is about the Spark Advance setting between 2-4k and 4-7k on a Diablosport Predator U7140

What exactly mean "maximum advance +10% and maximum retard - 40%
If the engine is set to 10 degree Before Top Dead Center (-10 degree BTDC)

Maximum Advance +10% mean (in degree) ???
i.e. +10% = - 1 degree or - 11 degree BTDC

Maximum retard - 40% mean (in degree) ???
i.e. -40% = + 4 degree or - 6 degree BTDC
It is right?