Price pattern are recognizable configurations of price movements that are identified using a series of trend lines and curves. There are two types of price patterns: Head and Shoulders, Double Tops, Double Bottoms are called Reversal patters. Whereas Flags, Pennants and Wedges are called Continuation patterns. These patterns provide reliable indicators for carrying out profitable trades when the Dow theory is not of much help. However one needs to be very cautious while reading these patterns which will only be obtained with sustained attention and a long practice.