Graha Maitri koota
Graha Maitri is the fifth Guna Milan factor, worth 5 points. It checks whether the lords of the two Moon signs are friends, and is read as a match of mental wavelength.
Also known as: Grah Maitri, Graha Maitram, Rasyadhipati porutham
Each Moon sign has a ruling planet: Mars for Aries, Venus for Taurus, and so on. Graha Maitri compares the two lords using the classical natural friendships between planets. If both signs share a lord, or each lord counts the other as a friend, the full 5 points are given.
The scale runs down from there: friend and neutral 4, both neutral 3, friend and enemy 1, neutral and enemy 0.5, and mutual enemies 0. Venus and Saturn, for example, are friends, while the Sun and Saturn are not.
Graha Maitri carries extra weight because it can soften other problems: many traditions treat Bhakoot dosha as cancelled when the two Moon-sign lords are the same or friends. South Indian matching has the equivalent Rasyadhipati porutham.