Fibonaci:
Retracement:
http://www.investopedia.com/terms/f/fibonacciretracement.asp?ad=dirN&qo=investopediaSiteSearch&qsrc=0&o=40186
http://www.investopedia.com/terms/f/fibonacciretracement.asp?ad=dirN&qo=investopediaSiteSearch&qsrc=0&o=40186
Retracement or reversal?
http://www.investopedia.com/articles/trading/06/retracements.asp?ad=dirN&qo=investopediaSiteSearch&qsrc=0&o=40186
http://www.investopedia.com/articles/trading/06/retracements.asp?ad=dirN&qo=investopediaSiteSearch&qsrc=0&o=40186