A candlestick chart is a popular financial chart used to represent the price movements of an asset over a specific time period. Each "candlestick" displays 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 colored to indicate whether the closing price was higher or lower than the opening price. Traders and analysts use candlestick charts to identify patterns and trends in the market. These patterns can help predict future price movements, making them a valuable tool for decision-making in trading and investing.