A candlestick chart is a tool used in technical analysis to track price movements in commodities or financial markets. It consists of four key prices: the opening price, closing price, highest price, and lowest price, forming a candle-like shape. The chart visually displays market trends, buying and selling pressure, and price fluctuations, helping investors quickly understand market conditions. Different colors represent price increases or decreases, while the shape of the candlestick reflects market sentiment. Although a candlestick chart is a powerful tool, it has limitations and should be used alongside other analysis methods for more comprehensive investment decisions.