Each sign of the zodiac is ruled by a particular planet. When a particular planet A is in a sign of the zodiac ruled by another planet B, then B is said to be the dispositor of A. For instance, if Venus is in Cancer, the Moon is its dispositor.
The house, sign, and general condition of the the dispositor influence the other planet and are therefore very helpful when interpreting the horoscope. For example, if Venus is in Cancer in the 10th house of career, and the moon is located in the fifth house, which rules children, the person might enjoy becoming an elementary school teacher.
A special case occurs when planet A is the dispositor of B and vice versa. This is called mutual reception, and the mutual influence is considered to have similar qualities to an aspect between the two planets involved, even if no actual aspect between the two is formed. An example of this would be the Moon in Taurus and Venus in Cancer.
Sometimes a chain of dispositor relations can be traced, ending in one planet called the final dispositor. It is a planet in the sign that it rules, i.e., in its domicile, such as the moon in Cancer or Venus in Taurus. This planet is a strong influence in the horoscope.
- Hamaker-Zondag, Karen. 1994. The House connection: how to read the houses in an astrological chart, Samuel Weiser, Inc.
- Oken, Alan. 2008. Rulers of the horoscope: Finding your way through the labyrinth, Ibis Press.