The Lot of Earthly Prosperity
The Part of Fortune (Lot of Fortune) is a sensitive point calculated from the Ascendant, Sun, and Moon. By day: Ascendant + Moon − Sun. By night: Ascendant + Sun − Moon. It is one of the most important Arabic Parts (Lots) in Western astrology, representing physical wellbeing, material prosperity, and the area of life where natural fortune tends to flow. Its sign and house reveal where ease and abundance are most accessible.
Calculation and Chart Placement
To find your Part of Fortune: take the Ascendant degree, add the Moon's longitude, subtract the Sun's longitude (for day charts). The resulting degree falls in a specific sign and house. The house position is highly informative Part of Fortune in the 2nd suggests material wealth through one's own efforts; in the 10th, fortune through career and public recognition; in the 5th, through creativity and children.
Reading Part of Fortune
Treat the Part of Fortune like a secondary Ascendant for material and physical life. Its ruler's condition in the chart matters significantly a well-placed ruler brings fortune more easily to that area. Transits and progressions to the Part of Fortune time periods of increased material luck or bodily wellbeing. If planets conjunct the Part of Fortune natally, they channel their energy directly into material and physical fortune.