It means the stock suddenly break up areas, and in the next trading day to open a gap, reflecting investors eager to complete the transaction, at a higher price to buy or sell at a lower price, and the greater the gap, reflecting the outlook the more clearly the trend, but if there is a breakthrough gap, with large volume, but also reflects the trend of the strong. Breakaway gap usually occurs at the edge of some wandering trading area, such as triangles, head and shoulder, with its main role is to arouse the attention of investors, display patterns has been completed, the trend will continue in accordance with the guidance patterns and its future trend, therefore, when any of these patterns of stock price after the gap, their chances of errors and failure is very low. Moreover, the gap appears mainly due to changes in supply and demand before the formation, therefore, when the breakaway gap appears, showing a more powerful breakthrough, but inherent in the future trend will be accelerated even more sharply. Therefore, when the breakthrough patterns, while continuing its rally, investors should they choose to buy the stock of a breakthrough gap. However, there is no ability to measure and predict any breakthrough gap, its role is just to tell you ︰ stock patterns have been confirmed, the future trend will be consistent with the patterns of prediction.