There are several ways in which astrology love matches are deduced. The first is based on astrology or 12 zodiac signs. These zodiac signs are associated with four classical elements -- fire, earth, water and air. It is this association that gives the zodiac signs several of their traits and qualities.
Since ancient times fire has been associated with Aries, Leo and Sagittarius; air has been associated with Libra, Aquarius and Gemini; water has been associated with Capricorn, Taurus and Virgo; and earth has been associated with Cancer, Scorpio and Pisces.
Since, water and earth are compatible and air and fire are compatible, therefore, astrology love matches can occur between Aries, Leo, and Sagittarius on one side and Libra, Aquarius and Gemini on the other. Similarly, one can expect astrology love matches to occur between individuals who are born under Capricorn, Taurus or Virgo with individuals born under Cancer, Scorpio and Pisces.
There can be no astrology love matches if the partners possess the wrong zodiac signs. In such cases, one can only expect acrimony and unhappiness, not love, romance and passion.
Several astrology sites use love meter or love calculator to help couples gauge the intensity of their love for each other. Such love calculators work well among young girls and boys who need to find out whether their first crush will survive or not. But such astrology love matches should not be taken seriously. They are very generalized.
You must remember that match making is a far more serious activity. There is no place for frivolity in it, because wrong forecasts can badly affect couples That is why astrology love matches should be decided by seasoned astrologers, who can read the natal charts of the couple. This is the right way of establishing compatibility.