A candlestick is a popular tool used in financial markets to represent the price movement of an asset over a specific time period. Each candlestick shows four key pieces of information: the opening price, closing price, highest price, and lowest price during that time frame. The body of the candlestick is filled or hollow, indicating whether the price went up or down. Traders often analyze candlestick patterns to make decisions about buying or selling assets. These patterns can signal potential market trends and reversals, helping investors understand market sentiment. By studying these patterns, traders can gain insights into the behavior of other market participants.