Article / Updated 03-26-2016
Four pieces of data, gathered through the course of a security’s trading day, are used to create a candlestick chart: opening price, closing price, high, and low. The candle in a chart is white when the close for a day is higher than the open, and black when the close is lower than the open. The wicks, lines sticking out of either end of the candlestick, represent the range between the day’s high and low prices.