Hello! After the stock price is affected by bullish or bearish, it fluctuates greatly. When the stock price rises under the influence of bulls, the opening price or lowest price of the exchange is higher than the closing price of the previous day by more than two reporting units. When the stock price falls, the opening price or the highest price of the day is lower than the closing price of the previous day by more than two reporting units. Or in a day's trading, it rises or falls by more than one reporting unit. The phenomenon of the above-mentioned stock price gap is called gap. It's easy to understand if you drive higher. It is generally considered as a signal to buy, but you should grasp it yourself.