Renko Chart Patterns & Strategy: How to Filter Market Noise
Standard candlestick charts pack the open, high, low, close, and time period into every candle, creating visual noise during choppy market consolidation. If you day trade on the National Stock Exchange (NSE), this constant flickering can trigger impulse trades and premature stop-outs. A Renko chart addresses this by removing the time element and focusing on pure price movement to clarify market structure and trend direction.
Quick Takeaways
- A Renko chart constructs uniform price bricks based purely on fixed or ATR-based price movements, completely filtering out time and minor market noise.
- Combining a two-brick reversal pattern with an Exponential Moving Average (EMA) may help filter some false breakouts during range-bound market phases, though it cannot remove them.
- Because Renko ignores time, it obscures intraday gap openings at 9:15 AM IST, creating potential execution lag and slippage risk if stop-losses are left unmanaged.
What Is a Renko Chart and How Does It Work?
A Renko chart is a technical charting method that filters market noise by displaying price movements as uniform bricks, building a new brick only when price traverses a designated threshold. Derived from the Japanese word renga (brick), Renko does not plot price against time intervals like standard 5-minute or daily candlestick charts. Instead, time is completely removed from the horizontal axis.
Each Renko brick is rendered equal in size. A new brick appears only after the price moves by a predefined point value—such as 10 points on the Nifty 50 index.
Bullish Brick (Green/White) = Price moves UP by 1 Brick Size
Bearish Brick (Red/Black) = Price moves DOWN by 1 Brick Size
Reversal Requirement = Price moves 2x Brick Size in opposite direction
If the price oscillates within a tight range without exceeding the designated brick size, the chart remains completely static. A single Renko brick can take 15 seconds to form during a sudden news breakout, or 3 hours during a sluggish afternoon session. This mechanism compresses sideways consolidation, helping traders stay aligned with the broader market direction without getting shaken out by minor wicks.
Selecting the Right Brick Size: Fixed vs. ATR
Choosing the appropriate brick size is the most important setting when building a Renko trading setup. Selecting a size that is too small introduces unnecessary noise, defeating the purpose of the chart. Conversely, choosing a size that is too large creates excessive execution lag, causing entries and stop-losses to sit too far from current market levels.
Traders primarily use two methods to set brick size:
- Fixed Brick Size: The trader manually specifies a static point value (e.g., 5 points for stock trading or 20 points for Bank Nifty). This method maintains visual consistency, but fails when market volatility expands or contracts rapidly.
- ATR Brick Size: Uses the Average True Range indicator (typically a 14-period ATR) from an underlying candlestick chart to set the brick threshold dynamically. When volatility expands, the brick size widens; when volatility drops, the brick size contracts.
| Feature | Fixed Brick Size | ATR Brick Size |
|---|---|---|
| Calculation Method | Predefined static point value | Dynamic calculation via 14-period ATR |
| Noise Reduction | Constant during stable volatility | Adapts dynamically to changing market volatility |
| Execution Lag | Predictable point distance | Variable point distance based on ATR value |
| Ideal Market Condition | Range-bound or fixed-volatility assets | High-volatility equity indices and swing setups |
Core Renko Chart Patterns and Structural Reversals
Renko bricks transform messy price action into clean geometric structures. Because wicks are absent by default in standard Renko setups, classic price action formations appear as distinct step-like blocks.
1. Brick Reversals (One-Brick & Two-Brick Flips)
To flip the color of the bricks, price must travel twice the distance of a single brick in the opposite direction. For example, if the current green brick closes at 24,000 with a 10-point brick size, price must fall 20 points (down to 23,980) to form the first red brick.
- One-Brick Flip: Signals potential exhaustion, but carries a high false-signal rate in sideways markets.
- Two-Brick Flip: Confirms structural momentum as price prints two consecutive bricks in the new direction.
2. Renko Double Top and Double Bottom
Standard double top and double bottom pattern formations often get obscured on candlestick charts by long upper or lower wicks. On Renko bricks, a double top forms when price rises to a brick high, pulls back to a swing trough, and returns to the same peak before reversing. A break below the trough confirms the reversal.
3. Renko Head and Shoulders
A Renko head and shoulders chart pattern displays three clear peaks: a central higher peak (head) flanked by two lower peaks (shoulders). Because Renko strips out minor fluctuations, neckline breakouts become visually unmistakable, providing clear structural levels for stop-loss placement.
Building a Renko Chart Strategy with Trend Filters
Relying solely on brick color changes can lead to frequent whipsaws during range-bound market conditions. A practical Renko chart strategy combines brick momentum with a trend-following overlay to filter out low-probability brick flips.
Strategy Rules: Renko 20 EMA Pullback Setup
- Trend Identification: Overlay a 20-period Exponential Moving Average (EMA) calculated on Renko brick closes.
- Bullish Regime: Renko bricks are printing cleanly above the 20 EMA.
- Bearish Regime: Renko bricks are printing cleanly below the 20 EMA.
- Setup Phase: Wait for price to pull back toward the 20 EMA in a counter-trend move (e.g., 2 to 3 red bricks printing during an uptrend).
- Execution Trigger: Many traders enter long when price rejects the 20 EMA and forms two consecutive green bricks in the direction of the primary trend.
Long Entry: Price > 20 EMA + Pullback to EMA + 2 Confirming Green Bricks
Stop-Loss: Placed 1 Brick below the swing low of the pullback
Take-Profit: 1:2 Risk-to-Reward Ratio or trail with a 2-brick stop
| Parameter | Long Setup Rule | Short Setup Rule |
|---|---|---|
| Trend Filter | Price above 20-period EMA | Price below 20-period EMA |
| Trigger Pattern | 2-brick bullish flip after pullback | 2-brick bearish flip after pullback |
| Stop-Loss Position | 1 brick below lowest pullback point | 1 brick above highest pullback point |
| Exit Condition | Fixed 1:2 Risk-to-Reward or EMA cross | Fixed 1:2 Risk-to-Reward or EMA cross |
Tips: Always calculate risk-per-trade based on the exact point distance of your stop-loss brick rather than using fixed share quantities, as ATR brick sizes shift over time.
Advantages and Critical Limitations of Renko Charts
While Renko can make charts clearer, it comes with trade-offs that every technical trader must evaluate.
Key Advantages
- Reduces Market Noise: Compresses small price wiggles and range-bound chop into quiet, empty space.
- Objective Trend Tracking: Reversals and structural breakouts are clearly defined by exact brick dimensions.
- Reduces Overtrading: Prevents traders from taking emotional entries during slow, low-volume consolidation phases.
Critical Limitations & Lag Risk
- Inherent Entry Lag: A new brick forms only after price has already moved a full brick, so entries and exits can come later than on a standard candlestick chart.
- Time Invisibility: Renko obscures time duration. A single brick could represent minutes or hours, making it difficult to judge volume velocity.
Warning: Renko hides intraday gap openings at 9:15 AM IST. If the market gaps up by 150 points at the open, Renko will instantly render multiple bricks simultaneously, which can lead to order slippage on market orders.
Renko Chart Setup for Nifty 50 and Bank Nifty
Applying a Renko chart strategy to high-volatility Indian index derivatives requires specific parameter calibrations to account for typical daily range dynamics on the National Stock Exchange (NSE). Index futures and options use leverage, so losses can be large relative to the margin or premium you put up.
Nifty 50 Settings
- Intraday Fixed Brick Size: 5 points to 10 points.
- ATR Setting: 14-period ATR on a 5-minute underlying candlestick chart.
- Application: Ideal for capturing sustained trend moves between 9:45 AM IST and 2:30 PM IST, avoiding initial opening gap turbulence.
Bank Nifty Settings
- Intraday Fixed Brick Size: 20 points to 30 points.
- ATR Setting: 14-period ATR on a 5-minute underlying chart.
- Application: Bank Nifty exhibits wider point swings; setting bricks below 15 points may cause frequent brick flips and higher trading costs, such as brokerage and exchange charges.
Monetyra’s Take: Renko charts can help traders who struggle with emotional decision-making caused by intraday candlestick noise. However, they are not a standalone holy grail. Because Renko obscures time and gap openings, many traders pair it with strict risk controls and trend overlays like the 20 EMA to limit slippage.
Conclusion
A Renko chart provides technical traders with a cleaner, less noisy view of market structure by focusing strictly on price movement and ignoring time. If you pick a sensible ATR brick size, spot structural chart patterns, and confirm trend direction with a 20 EMA, you can build a disciplined plan for Indian equity indices.
Technical analysis is where numbers meet human behavior.
FAQs
A Renko chart is a price-based technical charting tool that builds uniform bricks whenever price moves a specified distance, ignoring time completely. Green bricks indicate upward movement, while red bricks show downward movement. A reversal requires price to move double the brick size in the opposite direction.
Renko can work for intraday trading because it filters minor price fluctuations and keeps traders focused on the core trend, though results vary. However, traders must account for execution lag and avoid trading during the volatile 9:15 AM IST market open to minimize slippage.
The best brick size depends on the asset’s volatility and your trading horizon. Day traders often use a 14-period ATR from a 5-minute chart to set dynamic brick sizes. Others use fixed values, such as 5–10 points for Nifty 50 and 20–30 points for Bank Nifty.
The most reliable Renko chart patterns include the two-brick reversal flip, double tops and double bottoms, and head and shoulders formations. Because Renko eliminates candlestick wicks, support and resistance breakout levels appear cleaner and easier to read.
An Exponential Moving Average (such as the 20-period EMA) is a common companion to Renko charts. The EMA provides a clear trend direction filter, helping traders take pullback entries in the primary direction while avoiding false reversals in range-bound markets.
Disclaimer: This article was written with the help of AI and reviewed by the Monetyra editorial team. It is for educational purposes only and should not be considered financial advice. Trading and investing in financial instruments involve significant risk of loss and are not suitable for all investors, and past performance of any strategy does not guarantee future results. Please consult a licensed financial advisor before making any investment or trading decision.
In India, equity and derivatives trading are regulated by SEBI. Readers are advised to verify the regulatory status of their broker and ensure compliance with applicable Indian laws before investing.