Heikin-Ashi & Renko
Compare candlestick, Heikin-Ashi and Renko on identical data, and see precisely what the smoother-looking chart is hiding.
Runs entirely in your browser — nothing you type is sent anywhere. Educational only, and not investment advice.
How to use this calculator
Each step names a control you will find on screen above.
- Start with the standard candles
The reference. Every price the stock actually traded at is represented.
- Switch to Heikin-Ashi
Far cleaner, with long unbroken runs of one colour. Note that these candles are averaged — the open and close shown are not prices that occurred.
- Switch to Renko
Time is removed entirely; a brick is drawn only when price moves a set amount. Trends look beautiful and the delay is invisible.
- Compare the turning points
The comparison that matters. Find where the trend actually reversed and see how many sessions late each smoothed chart reported it.
Worked example: What the smoothing costs
The same price history in all three renderings, focused on one reversal.
What to enter
- Chart type
- Candles · Heikin-Ashi · Renko
What it shows you
- Candles
- Noisy, but every price is real
- Heikin-Ashi
- Smooth
- Renko
- Smoothest
- Reversal signalled
- Several sessions later on both
- What you cannot do
- Place a stop at a Heikin-Ashi price
open and close are computed, not traded
no time axis at all
Where this is taught
A calculator gives you a number. These explain what the number means and when it misleads you.
- Technical Analysis10 minHeikin-Ashi, Renko and point & figureCharts that trade information for clarity — what each one discards, and the specific mistake each one invites.
- Technical Analysis9 minChart types and choosing a timeframeLine, bar and candlestick charts; linear versus logarithmic scale; and why picking the wrong timeframe is the most common beginner error.
- Technical Analysis10 minLog or linear: the axis that changes what you seeThe same prices, plotted two ways, produce different trendlines, different patterns and different conclusions. Which one is right depends on the question.
- Technical Analysis9 minThe candle that has not closed yetAt 11 a.m. the daily candle is a hammer, by 1 p.m. it is a marubozu and at the bell it is a doji. Nothing is a pattern until the period ends.
- Technical Analysis11 minThe case for slowing downMost retail traders operate on timeframes that maximise noise, cost and stress while minimising their actual advantage. The weekly chart fixes all three.