MOOLATRIKONA: A planet is very strong and always favorable in its Moolatrikona position.
Moolatrikona: The planet has “trinal strength” in a particular sector in the appropriate constellation and is very strong and favorable.
To understand the basis of planetary friendship, you have to first understand the concept of the Moolatrikona sign
Each Graha has one sign that it is particularly closely related with. This sign corresponds best with the nature of the Graha, and is called its Moolatrikona sign. Moola means root, and implies that this sign is where the Graha has its “roots”.
Trikona means a triangle and hints at the fact that the 5th and 9th sign (forming a triangle with the Moolatrikona sign) are also having the same elements associated with it. For example, Mangal’s Moolatrikona sign is Mesha (Aries), a fiery sign. The Trikona signs are Simha (Leo) and Dhanu (Sagittarius) which are the 5th and 9th sign from Mesha. All three signs are associated with Mangal’s fiery nature, but out of those three, Mesha is yet the best and it is the Moolatrikona sign.

Each Graha has one sign that it is particularly closely related with. This sign corresponds best with the nature of the Graha, and is called its Moolatrikona sign. Moola means root, and implies that this sign is where the Graha has its “roots”.
Trikona means a triangle and hints at the fact that the 5th and 9th sign (forming a triangle with the Moolatrikona sign) are also having the same elements associated with it. For example, Mangal’s Moolatrikona sign is Mesha (Aries), a fiery sign. The Trikona signs are Simha (Leo) and Dhanu (Sagittarius) which are the 5th and 9th sign from Mesha. All three signs are associated with Mangal’s fiery nature, but out of those three, Mesha is yet the best and it is the Moolatrikona sign.
Sagittarius is Jupiter’s Moolatikona sign
