If you have thoroughly studied the details of your birth astrological chart or do not know anything about astrology beyond your horoscope sign, you probably know that planets are believed to have an effect on your personality. There are many contributing factors to whether someone is introverted or extroverted, but some signs are likely to be more introverted / extroverted than others.
In astrological terms, there are many things that can contribute if one is an extrovert or introvert - including their sign of Mercury (which is the planet of communication), activity within a few houses of their horoscope chart, and so on. However, the astrological concept that best fits the psychological spectrum of introverts versus extroverts is polarity.
Polarity in astrology is a way of categorizing the signs of the zodiac - meaning that each sign either has a "positive" or "negative" charge.
Polarizations are also known as a description of masculine vs. feminine energies, but many astrologers are moving away from using gender language to describe energy. Earth and water signs are at the negative end of the spectrum, which is associated with being introverted. To be clear, using the word "negative" here is not a bad thing - it simply means that the energy of these signs is more concentrated within. People born under the signs of these elements are usually more reflective and focused on the inner world of their feelings and senses.
Nothing is absolute and moreover no one can be 100% introverted or 100% extroverted, however the horoscope divides the signs as follows:
- Extroverts
1. Dashi
2. The twins
3. Play
4. Libra
5. Sagittarius
6. Aquarius
- Introverts
1. Demi
2. Crab
3. The Virgin
4. Scorpio
5. Capricorn
6. Fish
Source: Bustle