Renko Charts: Price-Only Noise Filtering
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Renko charts (from the Japanese "renga" = brick) strip out time and volume entirely, showing only price. A new brick prints whenever price moves by a predefined amount (the brick size), regardless of how long it took. Small consolidations that eat up hours of candlestick charts produce zero bricks — they're filtered out as noise. Renko's simplicity is its superpower: trends become obvious, entries become crisp, and the chart is almost impossible to overanalyze. But the same simplification has trade-offs that every trader should understand before switching.
How Renko Bricks Are Built
A new Renko brick prints in two situations: price moves up by one full brick size above the current brick's high (new up brick), or down by one full brick size below the current brick's low (new down brick). Between these thresholds — nothing gets added to the chart. If price hovers 0.9× the brick size back and forth for hours, the chart shows zero activity. The brick size is the single most important parameter: too small and you get noise; too large and you miss trends entirely. Common defaults on forex are 10–20 pips per brick; on stocks, 0.5% to 1% of price; on crypto, 0.5× to 1× ATR.
Renko vs Candlestick Charts
On a candlestick chart, every M15 bar prints — even if price moves 3 pips. On a Renko chart with a 10-pip brick, that tiny move prints nothing. Over a full trading day, a 15-minute candlestick chart shows 96 bars; an equivalent Renko might show only 10–20 bricks. The chart becomes far cleaner, trends become obvious rows of same-colored bricks, and reversals are genuine directional flips. Downside: Renko loses timing information completely — you can't see session boundaries, volatility cycles, or time-of-day effects. You also lose volume (though some platforms allow volume overlay). Renko complements candlestick charts; it doesn't replace them.
Classic Renko Trading Strategies
Three strategies dominate Renko trading. (1) Brick reversal entries: after a long run of green bricks, the first red brick often marks short entries — or vice versa. Simple, but prone to whipsaw; typically requires a 2-brick reversal confirmation. (2) Moving average crossovers on Renko: a 10 and 20 period EMA plotted on Renko charts produces extremely clean trend signals, because the underlying chart has already filtered noise. (3) Support/resistance retests: horizontal levels drawn from Renko swing highs and lows hold with unusual precision because the chart eliminates micro-whipsaws at those levels. Pair a Renko S/R level with a 2-brick reversal and you have one of the cleanest trend-following entries available.
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Traditional Renko vs ATR Renko
Traditional Renko uses a fixed brick size — 10 pips, 20 pips, etc. The problem: in a low-volatility environment 10 pips is meaningful; in a high-volatility market 10 pips is nothing. ATR Renko solves this by using a multiple of the current Average True Range (e.g., 1× ATR per brick). As volatility expands, bricks get larger; as it contracts, bricks get smaller. This keeps the signal-to-noise ratio consistent across market regimes. Most professional Renko users today prefer ATR Renko specifically because it adapts to changing market conditions without requiring manual brick-size adjustments.
Renko Limitations and When to Avoid It
Renko has three significant limitations. First, it lags reversals: because a reversal requires price to move two brick sizes against the trend (one to form a new brick, one more to close the prior candle direction), you miss the first leg of every reversal. Second, Renko is poor for range-bound markets — in tight ranges, brick counts collapse and the chart shows nothing; you need candlesticks or point-and-figure. Third, Renko completely hides time — critical information like session opens, news releases, and volatility windows is invisible. Avoid Renko in low-volatility consolidations, in pre-news hours, and if your strategy depends on session-based patterns (Asian open, London range, NY power hour).
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Frequently Asked Questions
What is the best brick size for Renko?
There's no universal answer — it depends on your timeframe and instrument. On forex majors, 10–20 pip bricks suit day trading; 50 pips suits swing. On stocks, 0.5–1% of price is typical. Most modern traders use ATR-based bricks (1× ATR, sometimes 0.5×) because they auto-adapt to changing volatility. Backtest different sizes on your strategy — the correct size is whichever produces the best signal-to-noise for your approach.
Can I use indicators on Renko charts?
Yes — and they often work better than on candlestick charts because the noise is already filtered. Popular choices: moving averages (EMA 10/20, SMA 50), RSI, MACD. The key caveat: indicator periods should be short because Renko compresses price action — a "50-period" SMA on Renko might cover 200 bars of equivalent candlestick time. Start with standard defaults, then shorten periods if signals feel too slow.
Do Renko charts show volume?
Some platforms allow volume overlay on Renko, showing total volume per brick. Many don't. Since Renko abstracts time away, volume is less intuitive — a large-volume brick tells you strong interest at that price level, but you can't easily see if it happened over 5 minutes or 5 hours. If volume analysis is central to your strategy, Renko alone is insufficient — you'll need a secondary time-based chart for volume context.
Are Renko charts good for beginners?
Renko is visually beautiful and removes much of the noise that frustrates new traders, so it can be a great learning tool for spotting trends. However, beginners often fall for two traps: (1) misinterpreting the backtest — historical Renko charts look like easy money because reversals are obvious in retrospect, but live Renko misses the first leg of every reversal. (2) Overtrading reversals; Renko whipsaws in chop. Start with candlesticks to learn price action properly, then add Renko as a supplementary tool.
Do Renko and Heikin-Ashi show the same thing?
No — they're different tools. Heikin-Ashi still uses time (each candle represents a fixed time period, like M15) but smooths OHLC values to highlight trends. Renko abstracts time completely and shows only price movement in fixed-size bricks. Heikin-Ashi is better when you want trend visualization with time context; Renko is better when you want pure price-movement focus without time noise. Some traders use both — Heikin-Ashi for session context, Renko for trend direction.
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Kacper MrukXAUUSD & ETHUSD Trader | Macro + options data | Think, don't follow
Creator of Take Profit Trader's App. Specializes in XAUUSD and ETHUSD, combining macro analysis with options data. He teaches not how to trade, but how to think in the market. Actively trading since 2020.
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