Arch Crawford, of The Crawford Perspectives (previously Astromoney), uses technical analysis and planetary cycles research to determine effective market-timing strategy.
Interestingly, Arch Crawford has also been interviewed by Dominic Frisby (direct link to MP3).
I must admit that I'm more than sceptical about him, but nonetheless, I'm going to listen and follow for some time. I wouldn't be surprised if he's right/accurate and uses the planetary cycles just not to have to disclose his real tools... Wait & See...
You can listen directly on the embedded player:
Here's a link to StreetIQ.com containing many interviews with Arch Crawford. It seems like Arch is a guest of this site every couple of weeks or so.