The angle at which the heel is tilted inward concerning the shin. EVORIDE ORPHE estimates this angle from the posture of the shoe immediately after landing.
The lower value on the negative side means the higher pronation.
Excessive pronation is generally considered to be a cause of running disorders, but research into the proper amount of pronation is underway. When you land from the outside of your foot or on the heel side excessively, the pronation increases. Thus, it is recommended to practice with an awareness of how you land on the surface.