Heikin-Ashi Candlesticks are similar, but different than normal candlesticks. A Heikin-Ashi Candlestick is hollow (white) when the HA-Close is above the HA-Open. Conversely, a candlestick is filled (black) when the HA-Close is below the HA-Open. This is similar to normal candlesticks, which are filled (black) when the close is below the open and hollow (white) when the close is above the open.