I practice Jyotish, also know a Indian or Vedic Astrology. I use the sidereal zodiac and a Jyotish based interpretation. The sideral zodiac adjusts for the procession of the Equinox The procession of is Equinox refers to the fact that the zodiac moves in relation to the earth. For example in the western or tropical zodiac the Sun is in Aries from March 21th to April 19th, but in the Sideral zodiac the Sun is in Aries from April 14th to May 15th. Jyothish also has unique and complex tools for interpretation and was historically used to predict events and to determine the most auspicious time for events like weddings or starting a business rather than as a way to analyze the personality.