What is horoscope?
Vedic Astrology has an excellent and proven method of horoscope matching (Horoscope Compatibility) based on nakshatras (Lunar Constellations), which is called Ashtakoot milan or simply guna milap. This kundali matching method assigns points for factors that influence marriage. More the points, more chances of success of the marriage. Though this method is not restricted to marriage only and can be used for compatibility analysis between boy and girl with slight modification.
In Ashta-Kuta system of match making (marriage compatibility), the maximum number of Gunas are 36. If total Gunas between the couple are between 31 and 36 (both inclusive) then the union is excellent, Gunas between 21 and 30 (both inclusive) are very good, Gunas between 17 and 20 (both inclusive) are middling and Gunas between 0 and 16 (both inclusive) are inauspicious.
It is also opined that the above grouping is applicable when Bhakuta Kuta is favourable. If Bhakuta Kuta is unfavourable then union is never excellent, Gunas between 26 and 29 (both inclusive) are very good, Gunas between 21 and 25 (both inclusive) are middling and Gunas between 0 and 20 (both inclusive) are inauspicious.
It should be noted that Nadi Kuta is given supreme priority during match making or kundli milan. If Nadi Kuta is unfavourable then a match with 28 Gunas is also considered inauspicious.