Brent brought up Gartley and Wolfe Waves a couple of days ago as a way of predicting where price is heading and when it will get there.  I started to read the sparse amount of information out there but from what I have read, it's pretty interesting stuff.  For a quick overview, visit http://www.investopedia.com/articles/trading/05/040405.asp

Here's a comment and recommended links from Brent:

According to my research the gartley and butterly patterns have an 80% success rate.

http://www.moneytec.com/forums/showthread.php?t=17228

http://www.forex-tsd.com/suggestions-trading-systems/1093-harmonic-trading-12.html

http://www.harmonictrader.com/

Gartley, Butterfly Patterns

http://www.forex-tsd.com/metatrader-4/885-price-patterns-gartley-butterfly-bat-2.html