Candle line

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A candle line is the basic symbol representing the change of data in a candle chart.

The candle line consists of a body (a rectangular box or a horizontal line segment), an optional upper shadow (a vertical line segment) and an optional lower shadow (a vertical line segment).

The body represents the interval between the opening and closing value of the data being charted over the period covered by the candle line (e.g., one day's price movement in a stock). The body will be a different color depending on whether the value rose or fell between the opening and closing. If the closing value is equal to the opening value, the body has no height and is shown simply as a horizontal line segment. The width of the body usually has no particular relation to the length of the period being measured.

An upper shadow represents the excursion of the value above the body during the period; and a lower shadow represents the excursion of the value below the real body during the period.