A derived-unit transform: to/from are monotonic inverses (either direction — a decreasing transform is fine); they may be nonlinear.
to
from
Derived unit → axis value (inverse of to).
Axis value → derived unit (e.g. strike → moneyness).
A derived-unit transform:
to/fromare monotonic inverses (either direction — a decreasing transform is fine); they may be nonlinear.