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 investors use candlestick charts to analyze market trends and make informed decisions. The patterns formed by multiple candlesticks can signal potential price movements, helping users identify bullish or bearish trends in the market.