Duads and Dwads are a mini zodiac within each zodiac sign – a sadly underrated astrological technique that shows how each 2 degrees 30 minutes of sign will have a different astrological signature e.g. someone born at 5 degrees Sagittarius will be in the Aquarius section of Sagittarius and be very different to someone born at 18 degrees Sagittarius in the Cancer section of that sign.
I have taken this further and worked out a technique that gives the duad degrees of each planet and angle, called a duad chart, which Graham Dawson of Esoteric Technologies kindly incorporated in the Solar Fire Program. This is so accurate that it shows the differences between twins born even a minute apart. It also shows genetic inheritance down the family line to such a finely tuned point that in a natural birth there is a clear connection between the Moon of the child and the Ascendant-Descendant axis of a parent (or vice versa). And for those who are relationship oriented it will often show the people to whom you are attracted and whether this is reciprocated.