The Ascendant or rising sign
This is why general astrology forecasts in the newspaper etc. are not that accurate as they are only telling you the prediction for your Sun sign. Real astrology uses all the planets in the sky, as well as your ascendant, asteroids, mathematically calculated angles, midpoints and degree's. This precise and complicated process is achieved when an Astrologer casts your individual chart using your date of birth, location and time of birth. This is called your birth or natal chart. Having a proper horoscope cast by an Astrologer can reveal everything about your past, present and future. A proper horoscope is way more accurate than the astrology for your Sun sign in a magazine. A proper horoscope is cast specifically for you, not a general forecast for all people born in the month.
Astrology is all about timing for as we know timing is everything. Your personal horoscope geared only for you is your guide to success in life, sort of like a map.