I consider myself an astronomy enthusiast, but it has nothing to do with trading, or at least I don't let it be so.
As for astrology, I don't follow it, but I am aware that many others do, and it pays to "know thine enemy" as if one is up on the thought processes of such people, it helps me to guage the fear factor which has a big part in deciding how much price to push when turning positions around at extreme prices. This is only a psychological thing, not an exact science so don't ask me to give out bands, lines, charts, etc!
Remember that to the average astrologer, a bollinger band is a bracelet made from little bottles of champagne links!