Jupiter is the significator of Astrology, as he is the Veda Karaka or indicator of Knowledge. Knowledge, both worldly and divine, is the prerogative of Jupiter.
He rules all arts and sciences ( Prayonu koola sa kalascha deva ).
If Jupiter is angular, a good astrologer is born
Other combinations are
Moon in Cancer
Moon and Jupiter, angular and well posited
Venus in the 11th
Mercury in the 11th