A bullish support line is drawn under rising reaction lows. A popular application of bullish support lines involves connecting two successively higher lows to form a test. A third low that falls upon the line confirms the support line. Subsequent penetration of an established support line is commonly thought to signal a change to a down trend. see, John J. Murphy, Technical Analysis of the Futures Markets, A Comprehensive Guide to Trading Methods and Applications, New York: New York Institute of Finance, A Prentice-Hall Company, 1986, p. 68.Bullish Support