The bull flag pattern is a technical chart pattern that forms during an uptrend in the stock market.1 It consists of a pole, which is the vertical rise of the stock, and a flag, which is a period of consolidation that follows.1 The flag can take the form of a horizontal rectangle or be angled down away from the prevailing trend.1 This pattern is called a bull flag because it resembles a flag on a pole.1 Here are some key points to understand about bull flags:12