No.
Nadi Porutham is not calculated by counting stars. It is a direct comparison of the Nadi groups assigned to the two birth stars.
About the Author: Rukesh Ganesan
Rukesh G has a strong interest in Tamil astrology, nakshatra analysis, and marriage compatibility. He studied astrology at Sri Sivasakthi Jothishta Vidiyala Academy and has analyzed over 3000+ Thirumana Porutham matches with practical experience in horoscope study.