Seems to trigger major social changes according to this site?
But in the area of stock market forecasts, which is one of the topics I post about, there is a system called the "Bradley Siderograph" which predicts stock market turns (highs and lows). It is based on a large amount of astrological information which is distilled into a simple graph.
There was a period of about a year when the Bradley charts worked uncannily well, predicting the exact day of turn after turn. Other times it is off by a few days, but very rarely doesn't show any correlation at all.
So I have to grudgingly accept the utility of the system, despite the implausibility of its astrological basis.
If anyone is interested in the forecast for this year:
http://www.amanita.at/e/faq/e-bradley.htm
Note: The chart DOESN'T trace out what the stock market will do. Rather, the inflection points of the graph show when the market will turn (may be opposite direction).