From earliest recorded times, the most important task of the astrologer was to prognosticate the variations in collective fortunes. From the Babylonians to the Arabs, ancient astrology was hardly separable from foretelling and only omens were drawn from the planetary movements. Furthermore, the first known astrology was, on an official level at least, exclusively mundane astrology - concerned with the welfare of the king and of the state.
In a local space (astrolocality) chart or horizon horoscope, the planets are referred to the plane of the horizon instead of the ecliptic; their positions are shown in degrees of azimuth around the circumference of the horizon, whilst their distance above or below this plane is recorded in degrees of altitude, positive or negative.
Detractors of astrology sometimes bring up the differences in character and fate of twins, brothers or sisters, in order to shake the fundamental principles of the art.
Primary Directions in astrology are an intricate system of moving ahead in time an horoscope, established on the rotary motion of the Earth.
The astrological chart, personal or mundane, may be compared to a set of tools which condition the work produced by the craftsman. A capable craftsman can produce valuable outcome with inferior instruments, whereas an incompetent workman makes little use of even good implements.
If astrologers are using ex post facto revelations and line everything up with precision, almost certainly they are using so many points of reference that the law of averages has prevailed.