Renko Chart

A Renko chart draws a new brick only when price moves by a predetermined amount — the brick size — completely ignoring how long that move takes. If price moves exactly one brick size up, a green (bullish) brick is added. If price reverses by one brick size from the high of the current brick, a red (bearish) brick is added starting one brick below. No fractional bricks exist: price must complete a full brick before it appears.

Brick size selection is the most critical parameter. A fixed dollar brick (e.g., $1 per brick) works poorly across securities with different price levels and volatility regimes. ATR-based brick sizing solves this: setting the brick size equal to the 14-period ATR ensures the chart adapts to each ticker's actual volatility. A stock with a 14-period ATR of $2 uses $2 bricks; a volatile tech stock with $8 ATR uses $8 bricks. This normalization makes Renko charts comparable across different securities.

Percentage-based bricks (e.g., 0.5% of current price) are another adaptive approach that works well for long-term analysis spanning large price ranges. Tradewink's Renko analysis uses ATR-based brick sizing that recalculates daily, ensuring the filter adapts to changing volatility conditions.

Renko's greatest strength is trend identification. A clean trend appears as a continuous series of same-colored bricks. Because bricks only form on meaningful price moves, short-duration price noise — intraday oscillations, gaps, and low-amplitude fluctuations — are filtered out. What remains is a visual representation of sustained directional pressure.

Trend reversal identification is equally direct. A reversal signal occurs when the first brick of the opposite color appears — but because this requires a full brick-size move against the current trend, it represents a meaningful shift in momentum rather than a trivial fluctuation. Compare this to candlestick charts where a single doji on a five-minute chart can create false reversal signals.

Support and resistance levels on Renko charts correspond to price levels where multiple reversals have occurred. These levels are objectively defined by the brick reversal structure — price that reversed twice at the same level is a double-bottom support by construction. This objectivity reduces the subjective interpretation common with traditional candlestick support and resistance drawing.

Trend-following with moving averages: Apply a simple moving average (10 or 20 bricks) to Renko prices. Buy when a series of green bricks forms above the moving average; sell when red bricks form below it. Because Renko filters noise, the moving average on a Renko chart is less susceptible to whipsaws than on a time-based chart.

Breakout from consolidation: When a Renko chart shows alternating green and red bricks within a narrow price range (similar to P&F congestion), it indicates indecision. A clean series of 3+ same-colored bricks emerging from this consolidation is a breakout signal. The more bricks in the consolidation, the stronger the breakout tends to be.

Support and resistance bounce: Identify price levels where multiple brick reversals have occurred. When price returns to these levels, watch for a reversal brick as a trade entry. The stop is clear: a close through the support/resistance level by one full brick invalidates the setup.

Combining with traditional indicators: RSI, MACD, and volume can be applied to Renko charts, but they behave differently than on time-based charts because the x-axis represents price moves rather than time. MACD crossovers on Renko charts tend to be less frequent and more reliable than on 5-minute candlestick charts.

Renko charts have meaningful limitations that traders must understand. The primary limitation is lag: because a new brick only appears after a full brick-size move, entry signals can come significantly later than on a candlestick chart. In a fast-moving market, waiting for a Renko reversal signal means entering several percent away from the optimal price.

Time-agnosticism is a double-edged feature. Ignoring time means a single Renko brick might represent 5 minutes of price action or 5 days. This makes Renko unsuitable for time-sensitive analysis — earnings dates, catalyst timing, or intraday session structure are invisible. Renko works best as a complement to time-based charts, not a replacement.

Gap handling is platform-dependent. Different charting platforms handle overnight gaps differently — some create multiple bricks in a single session open, while others ignore gaps. This inconsistency can produce different Renko charts on different platforms for the same security. Always verify how your platform handles gaps before trading from Renko signals.

Renko charts perform best for trend-following in strongly directional markets. In choppy, range-bound markets, they can produce excessive reversals as price oscillates within a narrow band, generating alternating bricks that provide no useful directional information.