Primary Directions are an ancient technique for forecasting. It is based on the primary motion of the earth - its 360 degrees of motion over the course of one day. As the earth turns, each of the planets rise, culminate and set. John Savarese provides a summary of his books that explain the technique and the steps for calculation.
A Summary of Directed Angles and Primary Directions by John Savarese, B.A. Syracuse University 1972, M.A. City University of New York, Hunter College 1974, NCGR-PAA (National Council for Geocosmic Research Professional Astrologers' Alliance) Level 3.