A stock chart shows data as points on a time continuum, such as days of the week. Stock values appear as a candlestick, a box with lines extending up and down from the ends. Open and close values mark the upper and lower edges of the box. High and low values mark the upper and lower points of the line.

Although a stock chart typically displays stock price data, you can also use a stock chart to show scientific data, such as temperature changes over time.