The power arrived a few weeks later with a strong move off support and a huge increase in volume. The stock subsequently advanced from the low forties to the low sixties. Head and shoulder bottoms are one of the most common and reliable reversal formations. It is important to remember that they occur after a downtrend and usually mark a major trend reversal when complete. While it is preferable that the left and right shoulders be symmetrical, it is not an absolute requirement.
Shoulders can be different widths as well as different heights.
Keep in mind that technical analysis is more an art than a science. If you are looking for the perfect pattern, it may be a long time coming. Analysis of the head and shoulders bottom should focus on correct identification of neckline resistance and volume patterns. These are two of the most important aspects to a successful read, and by extension a successful trade. The neckline resistance breakout combined with an increase in volume indicates an increase in demand at higher prices.