Free Online Renko Chart Maker

Build Renko charts that use fixed-size bricks to show price movements. Filter noise and spot trends clearly.

Built & maintained by the ChartLoad editorial team

What Is a Renko Chart?

A Renko chart, named from the Japanese word "renga" meaning brick, uses uniform fixed-size bricks that only appear when the price moves by a predetermined amount in either direction. Up bricks are displayed in one color and down bricks in another, stacked diagonally at 45-degree angles to form staircase-like patterns. Time is completely irrelevant in Renko charts, as a new brick is drawn only when the price movement threshold is met, regardless of whether that takes minutes or months. A reversal requires the price to move by at least two brick sizes in the opposite direction. This construction method produces exceptionally clean trend visualizations free of the minor noise and whipsaw signals that plague time-based charts, making support levels, resistance levels, and trend channels visually obvious.

What Data You Need for a Renko Chart

A Renko chart needs just a price series — one numeric value per row (a close price). The tool sets the brick size automatically as one-tenth of the series' full range (max − min), so there is no brick-size box to fill in. It then walks the prices and lays a new brick each time price moves a full brick-size beyond the last one. Example values: 148.20, 150.65, 149.10, 152.40, … The tool derives the brick size from these.

When to Use a Renko Chart

Use Renko charts for trend identification and confirmation in stocks, forex, cryptocurrencies, or commodities markets. They are particularly valuable for traders who want to identify clean trend channels and clear support and resistance levels without the distraction of intraday volatility. Swing traders rely on Renko charts to define entry and exit zones based on brick color changes and pattern formations such as double tops and double bottoms. Long-term investors use them to confirm whether an asset remains in a sustained trend. They are effective for comparing trend behavior across multiple correlated instruments, for setting trailing stop-loss levels based on brick reversals, and for creating visual summaries of price action in client-facing financial reports where clarity and simplicity are paramount.

Where a Renko Chart Works Best

Filtering forex chop on a pair like EUR/USD by setting a 10-pip brick so only meaningful directional moves print.
Spotting trend reversals to swing-trade: a single opposite-color brick (needing a 2x move with traditional Renko) flags a turn without the false signals candles throw.
Placing visual support and resistance — counting consecutive same-color bricks to gauge how extended a stock move is before mean reversion.
Backtesting a brick-based breakout strategy where entries trigger on the Nth green brick, decoupled from time so weekends and gaps don't distort the pattern.

Renko Chart Example: Auto-Bricked Uptrend

A trader loads 20 daily closes and lets the tool size the bricks from the

Sample data: 140,142,145,143,148,152,150,155,158,156,160,163,161,165,168,166,170,174,172,176.

The series ranges from 140 to 176, so the tool sets brick size = (176−140)/10 = 3.6. Walking the closes, each full 3.6-point advance prints a green brick and the few small pullbacks (e.g. 145→143, a 2-point dip) never reach a full brick, so they print no reversal — the chart shows a clean stack of up-bricks from ~140 toward ~176. (Values are the exact sample from js/data.js line 649; brick size 3.6 follows js/charts.js line 1742 brickSize = range/10, so the output is reproducible.)

How to Create a Renko Chart Online

Step 1: Open ChartLoad and select Renko Chart from the chart type menu
Step 2: Enter or paste your chronological price data series for any financial instrument
Step 3: Set the brick size, using the Average True Range as a starting reference point
Step 4: Observe the staircase pattern of up and down bricks to identify trend direction
Step 5: Look for color change reversals that signal potential trend shifts or entry and exit points
Step 6: Export the Renko chart as PNG, PDF, or SVG for trading analysis or financial reports

Renko Chart Best Practices & Tips

Renko bricks only form when price moves by a fixed amount, filtering out small noise and showing clean trends.
Choose the brick size based on the asset's typical price range — too small creates clutter, too large misses moves.
Note that the time axis in a Renko chart is uneven — bricks form based on price change, not calendar time.
Use Renko charts to identify support and resistance levels that are obscured by noise in candlestick charts.
Renko charts are best for long-term trend identification — they complement, not replace, time-based charts.
Backtest your Renko brick size against historical data to verify it captures meaningful moves without excessive noise.
Renko charts are especially useful for forex trading where 24-hour markets create too much candle noise on short timeframes.

Common Renko Chart Mistakes to Avoid

Setting the brick size too small for the asset — a 5-cent brick on a $300 stock prints hundreds of bricks and recreates the very noise Renko exists to remove.
Reading the time axis literally: Renko bricks are price-driven, not time-driven, so a quiet week may add zero bricks while one volatile hour adds six. The columns are not evenly spaced in clock time.
Using raw closing prices when you meant ATR-based bricks — a fixed $2 brick that suited a stock at $40 becomes far too coarse after it runs to $400; revisit the box size as price scales.
Expecting bricks to mark exact highs and lows. A brick only confirms after price closes a full box beyond the prior brick, so tops and bottoms always lag by at least one brick value.

Frequently Asked Questions

How do I choose the brick size?

Use the asset's Average True Range (ATR) as a starting point. Larger bricks filter more noise; smaller bricks show finer detail.

How is Renko different from Kagi?

Renko uses fixed-size bricks and reverses after a move of two bricks in the opposite direction. Kagi uses line thickness changes and reverses after any movement exceeding the reversal amount.

Why does a Renko chart have uneven time spacing?

Renko charts advance only when price moves by one brick size, ignoring time entirely. During low-volatility periods no new bricks appear, while rapid moves produce many bricks in quick succession. This time-independent behavior is what makes them effective at filtering market noise.

Related Chart Types

Ready-Made Renko Chart Templates

Skip the blank canvas — open a free, editable Renko Chart template, swap in your own data, and export. Browse all templates.

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