A composite chart, like other methods of chart comparison reveals how two people or entities interact. However, what the chart really reveals is what they have come together to learn either about themselves or the relationship. The chart is an overlay of two people’s chart comparing midpoints between planets and the house cusps and it calculates a third chart consisting entirely of these midpoints. Some people have a chart cast for new lovers they are involved with, and others like a mother and daughter may have a chart cast to see where their incompatibility lies. The chart becomes a tool for those who would benefit from the information that the chart reveals.