Bar graphs use vertical lines (bars) to show a symbol's high, low, opening, and closing prices for the specified interval (not the day's opening and closing prices). You can use either standard or candlestick bar charts.
Standard
A standard bar graph displays the price information as a vertical line whose ends represent the period's high (top) and low (bottom). Short horizontal lines indicate the opening (left side of bar) and closing (right side of the bar) prices.
Candlestick
A candlestick graph displays the price information as a vertical line whose ends represent the period's high (top) and low (bottom). Wide colored bars (candlesticks) indicate the opening and closing prices. A red candlestick indicates that the closing price was lower that the opening price. A green candlestick indicates that the closing price was higher than the opening price.
Note:
Green and red are the default colors for the first symbol in a chart. Additional symbols' bars will be different colors. View the chart settings to determine the directions the colors represent.