In Hellenistic astrology there are 9 lots (arabic parts) that are particularly important. In Sirius there are default Hellenistic style chart wheels which include the 9 Hellenistic lots and you can easily customize any chart wheel to include the 9 Hellenistic lots. However, astrologers do not agree about how these lots should be calculated. Fortunately, Sirius allows you to select the method you wish to use.