Since about 100 BC the above method has been the essential procedure of astrology,

Since about 100 BC the above method has been the essential procedure of astrology, 

though various refinements and additional devices occasionally have been introduced, including those associated with the Hermetic tradition of Hermes Trismegistos and with Dorotheus of Sidon, an influential astrological poet of the third quarter of the 1st century AD. One is the system of lots, which are influential points as distant from some specified points in the horoscopic diagram as two planets are from each other. A second is the prorogator, 

a point on the ecliptic that, traveling at the rate of one degree of oblique ascension a year toward either the descendant or ascendant, determines a person’s length of life. Another is the method of continuous horoscopy, under which anniversary diagrams are compared with the base nativity to provide annual readings. And, finally, certain periods of life are apportioned to their governing planets in a fixed sequence; these period governors in turn share their authority with the other planets by granting them subperiods. Astrology after the Hellenistic period In India Greek astrology was transmitted to India in the 2nd and 3rd centuries AD by means of several Sanskrit translations, of which the one best known is that made in AD 149/150 by Yavaneshvara and versified as the 

Yavanajataka by Sphujidhvaja in AD 269/270. The techniques of Indian astrology are thus not surprisingly similar to those of its Hellenistic counterpart. But the techniques were transmitted without their philosophical underpinnings (for which the Indians substituted divine revelation), and the Indians modified the predictions, originally intended to be applied to Greek and Roman society, so that they would be meaningful to them. In particular, they took into account the caste system, the doctrine of metempsychosis (transmigration of souls),

 the Indian theory of five elements (earth, water, air, fire, and space), and the Indian systems of values. The Indians also found it useful to make more elaborate the already complex methodology of Hellenistic astrology. They added as significant elements the nakshatras (or lunar mansions), an elaborate system of three categories of yogas (or planetary combinations), dozens of different varieties of dashas (periods of the planets) and antardashas (subperiods), and a complex theory of ashtakavarga based on continuous horoscopy. 

The number of subdivisions of the zodiacal signs was increased by the addition of the horas (15° each), the saptamshas (4 2/7° each), and the navamshas (3°20′ each); the number of planets was increased by the addition of the nodes of the Moon (the points of intersection of the lunar orbit with the ecliptic) and of a series of upagrahas, or imaginary planets. Several elements of Hellenistic astrology and its Sāsānian offshoot (see below), however—including the lots, the prorogator, the Lord of the Year, the triplicities, and astrological history—were introduced into India only in the 13th century through the Tājika texts. Besides genethlialogy, the Indians particularly cultivated military astrology and a form of catarchic astrology termed muhurta-shastra and, to a lesser extent, iatromathematics and interrogatory astrology.