The way in which the Part of Fortune, as displayed in charts, is calculated may be selected by the user. The options are as follows.
•Different Day/Night - According to researchers of ancient astrological texts, the correct method of calculating the Part of Fortune is to use Asc+Moon-Sun for daytime charts, and Asc+Sun-Moon for nighttime charts.
•Fixed Formula - (Daytime Only). Many astrological programs in the past have used a calculation for the Part of Fortune which is based on a single formula for both day and night charts i.e. Asc+Moon-Sun. Although this is now thought to be incorrect, many astrologers have become accustomed to using it in this way, so this option is included for their convenience.