Price patterns are double top,double bottom head shoulder, cup pattern, Flag and triangle. These are very powerful to identify the price behavior.
Double top indicates the resistance level and will be followed by a bearish trend.
Double bottom is just opposite. Head and shoulder gives a bearish trend and normally is trap by the stronger hand. Cup pattern over long duration and becomes bullish when the cup is getting matured. Flag steeper pole and cloth like structure -over a short period say about 10 to 12 days. Will break out in the same direction. Triangle pattern can break out in any direction and happens over a duration of 45 days.