Renko Chart
A chart built from fixed-size bricks placed at 45° angles — new bricks appear only when price moves by a set amount, filtering out noise and revealing clean trends.
// 01 — The chart
What it looks like
A Renko chart with a $5 brick size. Green bricks rise at 45° when price advances by $5; red bricks fall at 45° when price drops by $5. The staircase pattern makes trends immediately obvious.
// 02 — Definition
What is a Renko chart?
A Renko chart is a financial visualization built from uniform blocks called “bricks” (from “renga,” the Japanese word for brick). Each brick represents a fixed price movement. A new green brick is added when the price rises by the brick size; a new red brick is added when it falls by the same amount. Bricks are placed at 45-degree angles, creating a clean staircase pattern.
Unlike candlestick or bar charts, Renko charts completely ignore time. A single brick might represent one hour of trading or one month — only the magnitude of the price change matters. This makes Renko charts exceptionally good at filtering out market noise and highlighting the underlying trend.
The simplicity of Renko charts is their greatest strength. Because every brick is the same size, visual patterns are immediately clear: a long staircase of green bricks is an uptrend, a cascade of red bricks is a downtrend, and alternating colors signal consolidation. There are no wicks, shadows, or gaps to interpret.
Origin: Renko charts are believed to have originated in Japan, likely during the Meiji era (late 19th century). The name derives from “renga,” meaning brick. Like other Japanese charting methods (candlesticks, Kagi, three-line break), Renko was introduced to Western audiences by Steve Nison in his 1994 book Beyond Candlesticks.
// 03 — Anatomy
Parts of a Renko chart
// 04 — Usage
When to use it — and when not to
- You want to identify trends with minimal noise — Renko excels at filtering minor fluctuations
- Looking for clean support and resistance levels from the brick boundaries
- You need a simple, intuitive chart that’s easy for beginners to read
- Your trading strategy is trend-following and benefits from fewer false signals
- Comparing the strength of trends across different instruments
- You want to spot breakouts and reversals quickly from color changes
- You need to know exactly when price movements occurred — Renko discards time
- Your analysis requires volume information — Renko charts don’t display volume
- You need OHLC detail within each period — use candlesticks instead
- Trading in low-volatility, range-bound markets where few bricks form
- You’re scalping or require sub-minute precision for trade entries
- You need to analyze gaps, since Renko can mask overnight or weekend gaps
// 05 — Reading guide
How to read a Renko chart
Follow these steps whenever you encounter a Renko chart in the wild.
Note the brick size
Before interpreting anything, check the brick size (usually shown in the chart header or legend). This is the fixed price movement each brick represents. A $5 brick on a $100 stock means every brick equals a 5% move. The brick size completely determines how sensitive the chart is.
Read the color sequence
Green bricks mean the price is rising; red bricks mean it’s falling. A long run of one color indicates a strong trend. The transition from green to red (or vice versa) signals a potential reversal — and requires the price to move 2× the brick size in the opposite direction.
Count bricks for trend strength
The number of consecutive same-colored bricks measures trend strength. Five green bricks means the price has risen by 5× the brick size without a meaningful pullback. Short sequences of 1–2 bricks suggest choppy, indecisive markets.
Identify support and resistance
Look for price levels where the chart repeatedly reverses. If bricks consistently turn red at the same height, that’s resistance. If they consistently turn green at the same level, that’s support. These horizontal zones are often cleaner than on time-based charts.
Watch for breakouts
When the chart punches through a level that has repeatedly held as support or resistance, the breakout is significant. Renko breakouts tend to be more reliable than on noisy time-based charts because minor fluctuations have already been filtered out.
// 06 — Pitfalls
Common mistakes
Choosing a brick size that is too small
Fix: A tiny brick size defeats the purpose of Renko — filtering noise. The chart becomes a jagged mess that resembles a tick chart. Start with a brick size equal to the Average True Range (ATR) of the asset, then adjust based on your trading horizon.
Forgetting about the 2× reversal requirement
Fix: A reversal in Renko requires the price to move twice the brick size against the current direction. If your brick size is $5, the price must drop $10 from a green brick’s top to form a red brick. This built-in delay means reversals are always confirmed but never early.
Using Renko for precise entry timing
Fix: Because Renko discards time, you cannot determine when a brick was formed. A brick that appears on the chart might have formed in minutes or weeks. For precise entry timing, use Renko for direction and a time-based chart for execution.
Ignoring the gap problem
Fix: Renko charts can mask significant overnight or weekend gaps. A stock might gap down 15% on earnings, but the Renko chart simply draws three red bricks. Always check time-based charts for gap events that Renko conceals.
Backtesting with close-price Renko
Fix: Traditional Renko uses closing prices, which means intraday high/low data is lost. The “high/low” Renko variant uses the actual high and low of each period, producing more accurate results for backtesting trading systems.
// 07 — In the wild
Real-world examples
Trend-following in equities
Position traders use Renko charts on large-cap stocks to ride multi-week trends. With a brick size set to the 14-day ATR, the chart produces clean entry and exit signals. The simplicity of “buy on green after red, sell on red after green” appeals to systematic traders.
Cryptocurrency trading
The extreme volatility of Bitcoin and Ethereum makes Renko charts particularly useful. A percentage-based brick size (e.g., 2%) adapts to crypto’s wide price swings, producing cleaner trend signals than time-based charts that are dominated by noise.
Forex trend identification
Currency traders use Renko on pairs like USD/JPY and EUR/USD with pip-based brick sizes (e.g., 20 pips). The time-independent nature suits the 24-hour forex market, where traditional session boundaries are less meaningful.
// 08 — Quick reference
Key facts
// 09 — Variations
Types of Renko charts
Renko charts come in several variants that differ in how bricks are constructed.
Traditional (close) Renko
Uses only closing prices to determine brick formation. Simple and widely supported, but ignores intraday extremes.
High/Low Renko
Considers the high and low of each period, not just the close. Captures more intraday price action and produces more bricks.
ATR Renko
Dynamically sets the brick size to the Average True Range, automatically adapting to current volatility conditions.
Wicked Renko
Adds wick lines to each brick showing the actual high and low reached before the brick closed. Combines Renko simplicity with candlestick detail.
// 10 — FAQs
Frequently asked questions
What is a renko chart?+
A Renko chart is a financial visualization built from uniform blocks called "bricks" (from "renga," the Japanese word for brick). Each brick represents a fixed price movement. A new green brick is added when the price rises by the brick size; a new red brick is added when it falls by the same amount. Bricks are placed at 45-degree angles, creating a clean staircase pattern.
When should you use a renko chart?+
Use a Renko chart when you want to identify trends with minimal noise — Renko excels at filtering minor fluctuations. It also works well when looking for clean support and resistance levels from the brick boundaries, and when you need a simple, intuitive chart that’s easy for beginners to read.
When should you avoid a renko chart?+
Avoid a Renko chart when you need to know exactly when price movements occurred — Renko discards time. It is also a poor fit when your analysis requires volume information — Renko charts don’t display volume, or when you need OHLC detail within each period — use candlesticks instead.
How is a renko chart different from a kagi chart?+
Both a Renko chart and a Kagi chart can look similar at first glance, but they answer different questions. Reach for a Renko chart when the comparisons and patterns it was designed to reveal match what you need to communicate, and choose a Kagi chart when its particular strengths better fit your data and audience.
Is a renko chart suitable for dashboards?+
Yes — a Renko chart can work well in dashboards as long as the panel is large enough for readers to perceive the encoded values, has a clear title, and includes the legend or axis labels needed to interpret it.
What category of chart is a renko chart?+
Renko Chart belongs to the Financial family of charts. Charts in that family are designed to answer the same kind of question, so they often work as alternatives when one doesn't quite fit your data.