Kaal sarp yog is formed when in an horoscope, all the seven planets comes between or hemmed between rahu and ketu. Rahu is considered serpent’s head and ketu is dragon’s tail. So the presence of kaal sarp yoga in an horoscope is considered particularly harmful as all the planets are surrounded by the serpent and thus loose their good impacts to a great extent which will make person less lucky, creates problems and delays in many important aspects of life.
When all the seven planets are on the same side of rahu and ketu axis and not a single planet is on the other side, the full kaal-sarp dosha is formed. If even a single plane is on the other side of this axis, then it is not a kaal sarp yog. In this case, partial kaal sarp yoga is formed which is a kaal sarpa yog of less intensity.
Having kal sarp yoga in horoscope doesn’t mean that person will be totally unlucky and devoid of all the good things of life. The overall results differs from person to person and it depends on other yogas in the particular horoscope.
Famous astrologer Deepak Bhargav is well known personality in this field. Many people look up him for guidance and receive his suggestions to improve their lives.