| Bar charts have a wide variety of applications and in the financial markets are used by technical analysts to plot share price histories of companies. The chart is similar to a line chart in having time along the X-axis and price along the Y-axis. But instead of a single point being put on the chart for each time period (say each day) a vertical bar is drawn. The top of the bar is drawn at the highest price reached by the instrument during the day and the bottom of the bar is at the lowest price. A variation on the simple bar chart is made when opening and closing prices are available. As well as the main bar, the opening price is represented by a tick on the left side of the bar and the closing price by a tick on the right side of the bar.
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