Your Sun, Moon, and Rising signs - known as the "Big Three" - are important, but they represent only 3 of the hundreds of factors in your complete birth chart.
A full astrological reading also considers Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto, the houses, aspects between planets, nodes, asteroids, and more.
This is why reading only Sun sign horoscopes gives you less than 10% of your actual astrological picture. Professional astrologers analyze the entire chart for accurate insights.