Dunno. A lot of Wall St forecasting is honestly worse and less reliable than going to a watch doctor or playing roulette.
I'll confess I'm a little sad at this attitude but people miss out on good stuff all the time.
EDIT: thought about this one a little more. There are definitely better and worse astrologers out there. The good ones will treat your birth chart and transits/progressions as a template for growth, a map to your life. The bad astrologers will condemn you to your fate because of when you were born. There's an enormous world of difference.