Another consideration is the difference in the types of astrology. Astrology is popularly considered to be a rather surface fitz-all prediction for all people born on one birth day or even one month. This is a rather useless caricature of natal astrology. But what I think OP is talking about is a branch called electional astrology, which has to do with events. There is also horary astsrology, which deals with questions, and mundane, which covers nations.