Heikin-Ashi
Heikin-Ashi is a Japanese candlestick variant that calculates each candle using averaged price data from the current and prior period, producing a smoother visual representation of price trends.
The term Heikin-Ashi translates roughly from Japanese as 'average bar.' Rather than plotting open, high, low, and close directly from raw market data, Heikin-Ashi recalculates each candle's values using a formula that incorporates the previous candle. The Heikin-Ashi close is the average of the current period's open, high, low, and close. The Heikin-Ashi open is the midpoint of the prior Heikin-Ashi candle's open and close. The high and low use the maximum and minimum of the actual values and the derived open and close.
This averaging process visually smooths out the choppy back-and-forth that characterizes raw candlestick charts during volatile sessions. In historical data, prolonged sequences of hollow (white or green) Heikin-Ashi candles with minimal or no lower wicks appeared during periods when prices moved persistently higher over multiple sessions. Conversely, extended sequences of filled (black or red) candles with minimal or no upper wicks appeared during periods of persistent downward movement.
Small-bodied Heikin-Ashi candles with wicks on both sides historically appeared at junctures where a previous directional move lost momentum before resuming or reversing. Because the bodies tend to be larger and the sequences more uniform compared to standard candlesticks, trend identification was considered more visually intuitive by practitioners who relied on the method.
One important characteristic of Heikin-Ashi charts is that the values displayed are derived rather than actual market prices. The open and close shown on any given candle do not represent the exact prices at which the market opened or closed during that session. Analysts who used Heikin-Ashi for reference in historical studies were aware that price levels read directly from the chart required translation back to actual market prices for precise measurement.
Heikin-Ashi has been applied to equities, commodities, and foreign exchange markets. It pairs naturally with momentum-based overlays because both approaches attempt to track the direction and strength of a price move while filtering out session-to-session noise. Historical studies of the method noted its tendency to remain in a single color for extended runs during strong trending environments and to produce frequent color alternation during sideways periods.