What Is a Heikin Ashi Chart in Forex?
A Heikin Ashi chart is a modified version of a standard candlestick chart in which each candle is calculated from a blended average of the current and previous period’s prices, rather than from raw open-high-low-close data. The name comes from the Japanese term for “average bar” or “average pace.” The result is a smoother chart that filters out much of the small back-and-forth movement seen in standard candles, making trends easier to identify visually. Heikin Ashi charts have become a common alternative chart type in forex trading platforms, but they trade some of their clarity for a loss of precision. The candles do not show actual market prices, and that distinction has important practical consequences. This article explains how Heikin Ashi candles are calculated, what they look like compared with standard candles, how traders use them, and what limitations to keep in mind.
How Heikin Ashi Candles Are Calculated
Heikin Ashi candles use four formulas to derive their open, close, high, and low from the underlying market data. The current candle’s close is the average of the actual open, high, low, and close for that period. The current candle’s open is the average of the previous Heikin Ashi candle’s open and close. The high is the highest of the current actual high, the current Heikin Ashi open, and the current Heikin Ashi close. The low is the lowest of the current actual low, the current Heikin Ashi open, and the current Heikin Ashi close.
Expressed compactly:
- HA Close = (Open + High + Low + Close) / 4
- HA Open = (previous HA Open + previous HA Close) / 2
- HA High = max(actual High, HA Open, HA Close)
- HA Low = min(actual Low, HA Open, HA Close)
The first candle in a Heikin Ashi series uses the actual open and close of the first underlying candle as a starting point, since there is no prior Heikin Ashi candle to reference. From the second candle onward, the formulas operate as described, with each new Heikin Ashi candle inheriting some of its prior candle’s values.
The blending of current and prior data is what gives Heikin Ashi candles their characteristic smoothing effect. Each candle carries forward part of the previous candle’s range, which reduces the appearance of small random fluctuations and emphasises sustained directional movement.
What Heikin Ashi Candles Look Like
A Heikin Ashi chart resembles a candlestick chart at first glance. Each candle has a body and wicks, and the body colour indicates direction. But the visual character is noticeably different.
During a strong uptrend, Heikin Ashi candles tend to show a series of bullish candles with little or no lower wick. The absence of a lower wick reflects the fact that the smoothing formulas pull the open higher than the actual low during sustained upward momentum. During a strong downtrend, the reverse happens. The candles are bearish with little or no upper wick.
When a trend weakens or pauses, the candles begin to show wicks on both sides, smaller bodies, and the occasional candle of the opposite colour. This shift is often easier to spot on Heikin Ashi than on a standard candlestick chart, because the smoothing makes the underlying transition stand out more clearly.
The body colour change from green to red (or red to green) on Heikin Ashi often comes a candle or two later than the corresponding shift on a standard chart, because the formula carries part of the prior candle into the new one.
Heikin Ashi Versus Standard Candlesticks
The two chart types share the same visual vocabulary (bodies, wicks, colour) but display different data.
A standard candle shows actual market prices: the actual open, high, low, and close for the session. A Heikin Ashi candle shows averaged and blended values that do not directly correspond to any tradable price.
| Feature | Standard Candle | Heikin Ashi Candle |
|---|---|---|
| Open price displayed | Actual session open | Average of previous HA open and close |
| Close price displayed | Actual session close | Average of current OHLC |
| High and low displayed | Actual session high and low | Highest/lowest of actual range and HA open/close |
| Wick presence | Reflects actual rejection within the session | Reflects whether smoothing pulls open inside the actual range |
| Trend appearance | Mixed colours common even in trends | Long runs of same-colour candles during trends |
The practical effect of this difference is significant for execution. If a Heikin Ashi candle shows an “open” of 1.0850, that figure is a calculated value. It is not the actual price at which the session began. The same applies to the close. A trader placing a market order does not transact at the Heikin Ashi prices on the chart. They transact at the actual market price.
How Traders Use Heikin Ashi
The main practical use of Heikin Ashi is trend identification. Traders often switch to Heikin Ashi when they want a cleaner read on whether a trend is intact, accelerating, or weakening. The continuous run of same-colour candles during a sustained trend, and the appearance of doji-like candles with wicks on both sides at trend transitions, can make the broader direction easier to see than on a standard candlestick chart.
A second common use is filtering. Some traders place a Heikin Ashi chart alongside a standard chart and use the Heikin Ashi only to gauge whether the current environment is trending or ranging. Entries and exits are then taken on the standard chart, where the actual prices are visible and execution can be planned precisely.
Heikin Ashi is also used in systematic and discretionary trend-following strategies. A rule such as “stay long while Heikin Ashi candles remain bullish and switch when they turn bearish” can produce a relatively simple framework for trend trading, though such rules need to be tested carefully against the cost of trading and the slippage that real execution involves.
Limitations
Heikin Ashi’s smoothing comes at a cost. The most important limitation is that the candles do not show actual prices. The open and close on a Heikin Ashi candle are calculated values, not tradable levels. This means that entry, stop, and target levels read directly from a Heikin Ashi chart will not correspond to actual market prices.
A second limitation is lag. Because each candle inherits part of the previous candle, Heikin Ashi reacts to changes in direction more slowly than a standard candlestick chart. A trader using Heikin Ashi for trend identification typically sees the trend confirmation a candle or two after a standard chart would show it. This delay can be useful for filtering out noise but harmful for catching the earliest part of a move.
A third limitation involves doji-like candles. Standard candlestick patterns such as pin bars, engulfing candles, and dojis are defined on actual prices. Their equivalents on Heikin Ashi do not represent the same market behaviour and should not be read with the same rules. Mixing classical candlestick pattern recognition with Heikin Ashi charts can lead to misreads.
Used in its own terms, as a trend visualisation rather than a price-action tool, Heikin Ashi remains a useful chart type. Used as a substitute for a standard candlestick chart, it tends to mislead.
Frequently Asked Questions
What does Heikin Ashi mean? The name comes from the Japanese term for “average bar” or “average pace.” It refers to the way each candle is calculated from a blended average of the current and previous period’s prices, rather than from raw market data.
How is the Heikin Ashi close calculated? The Heikin Ashi close is the average of the actual open, high, low, and close for the current period: (Open + High + Low + Close) divided by four. This is the most distinctive of the four Heikin Ashi formulas.
How is the Heikin Ashi open calculated? The Heikin Ashi open is the average of the previous Heikin Ashi candle’s open and close: (previous HA Open + previous HA Close) divided by two. This is what gives Heikin Ashi candles their smoothing effect, since each candle inherits part of the previous candle.
Why do Heikin Ashi charts look smoother than standard candlestick charts? The smoothing happens because each Heikin Ashi candle blends current and previous data. Small fluctuations in the underlying market are absorbed into the averaged values, leaving longer runs of same-colour candles during trends and clearer transitions at turning points.
Can you trade directly off Heikin Ashi prices? No. The open, close, high, and low displayed on a Heikin Ashi candle are calculated values, not tradable prices. Market orders execute at actual market prices, not at the values shown on the Heikin Ashi chart. Traders using Heikin Ashi for entries should refer to the actual chart for execution levels.
Are classical candlestick patterns valid on Heikin Ashi charts? Not in the same way. Patterns such as pin bars, engulfing candles, and dojis are defined on actual prices. Their Heikin Ashi equivalents do not represent the same underlying market behaviour and should not be read with the standard rules. Mixing classical candlestick analysis with Heikin Ashi can be misleading.
What is the main use of Heikin Ashi for traders? The most common use is trend identification. The smoothing makes it easier to see whether a trend is intact, accelerating, or losing strength. Many traders combine Heikin Ashi for trend context with a standard candlestick chart for actual entries and exits.