Decan Compatibility

Read compatibility more finely than sign matching, using both signs and decans (sub-rulers).

Decan compatibility reads the match between two people by their signs and decans (the 10° subdivisions that split each sign into three). On top of sign aspect and elemental relationship, it factors in each decan's sub-ruler (traditional triplicity) resonance, so even couples of the same signs get subtly different results by decan. Pick both signs and decans for a finer compatibility reading.