Professors of Astrology say that the six kinds of strength (Shadbala) taken in the following order — namely Drigbala (strength of aspect), Stthanabala (positional strength), Nisargabala (natural strength), Cheshtabala (motional strength), Digbala (directional strength) and Kalabala (temporal strength) — have varieties indicated by the numbers 1, 5, 1, 5, 1, 7 respectively. The minimum required strengths (Rupas) for the Sun, Moon, Mars, Mercury, Jupiter, Venus and Saturn are respectively 390, 360, 300, 420, 390, 330 and 300 Shashtiamsas.