The Chaturthamsha chart, D-4, is the fourth divisional chart, formed by dividing each sign into four parts of seven and a half degrees. It signifies fortune, property, and fixed assets, land, home, and the material foundations of life, echoing the fourth house of the birth chart, which governs the same matters. It is sometimes called the Turyamsha. The chart is one of the sixteen divisional charts (shodashavarga) through which jyotisha examines a nativity, each magnifying one department of life. An astrologer consults the D-4 for questions of real estate, inheritance of property, and domestic security. These are the interpretive conventions of the tradition; the divisional charts are a harmonic technique for drawing many focused readings from the same planetary longitudes of the birth moment.
The rule again follows a kendra construction, on the same angular logic as the trine rule governing the Drekkana: the first seven-and-a-half-degree part of a sign belongs to the sign itself, the second to the fourth sign from it, the third to the seventh, and the fourth to the tenth, so a planet in the earliest part of Aries stays in Aries in the D-4 while a planet in the last part of Aries appears instead in Capricorn. Because the four resulting signs, first, fourth, seventh and tenth, are always the four kendras, angular houses, from whichever sign is being divided, the Chaturthamsha shares its underlying geometry with the four cardinal points of the birth chart itself, which is part of the traditional rationale for reading it as concerned with foundation and fixed possession.