Gap gap refers to the phenomenon that the opening price of a stock is higher than yesterday's highest price or lower than yesterday's lowest price, which makes the K-line chart blank. Suppose yesterday's closing point was 1000, and today's opening point is 1020, which has been running above 1020, which is completely a gap of 20 points. If the lowest point of the day is lower than 1000, it can only be said that the gap is high and the gap has been filled. If the minimum is between 1000 and 1020, it is partial compensation. Generally speaking, if there are no extremely special circumstances, the change of stock index or stock price should be continuous. However, in the actual operation process, investors often encounter a blank area where there is no transaction between two adjacent K-lines, which is what we often call the gap. From the technical analysis, the gap is generally an obvious trend signal. If the stock price jumps upward, it means that the upward trend may come; If there is a downward gap in the stock price, it may indicate adjustment or decline. Except for the right gap caused by annual dividend, share allotment or additional issuance, the gap we encounter can generally be divided into four types: ordinary gap, breakthrough gap, persistent gap and consumable gap. (1) Common gaps have no special analytical significance, and will be completely filled in a few trading days, which can only help us identify the formation of a certain type. The probability that ordinary gaps appear in the finishing form is much greater than that in the reverse transformation form, so when we find that there are many gaps in the developing triangles and rectangles, we must strengthen our belief that we are finishing forms.

(2) The analysis of breakthrough gap is of great significance, which often appears in important turning forms such as head-shoulder-bottom breakthrough, and this gap can help us identify the authenticity of breakthrough signals. If the stock price breaks through the support line or resistance line and jumps out of the gap, it can be seen that the breakthrough is strong and there are few mistakes. The reason for breaking through the gap is that the horizontal resistance has been completely absorbed after a long struggle, and the supply is in short supply in a short time, and the investors who buy it are forced to ask for goods at a higher price. Or its support level after a period of supply, purchasing power is completely exhausted, and buyers can only be found at a lower price, thus forming a gap.

If the volume is large before the gap appears, but the volume is relatively reduced after the gap appears, half of them may close their positions quickly. If the gap appears, as the stock price moves away from the gap, the trading volume will not decrease and the position will not be closed in the short term.

(3) The technical analysis of persistent gaps is of the greatest significance. It usually appears in the middle of the stock price breakthrough to the next reversal or consolidation type, so the persistent gap can roughly predict the distance that the stock price may move in the future, so it is also called the measurement gap. Its measurement method is the vertical distance from the breakthrough point to the starting point of the persistent gap, which is the range that the stock price will reach in the future. Or we can say: the distance that the stock price will go in the future is the same as that in the past.

(4) The appearance of consumable gap indicates that the trend of stock price will come to an end temporarily. If it is on the way up, it means it will fall soon; If there is a downward trend, it means that it is about to pick up. However, the consumption gap does not mean that the market will definitely turn, although it means that it is possible to turn.