What is a Renko Chart?
A Renko chart is a type of financial chart developed by the Japanese that focuses purely on price movement, placing bricks by price thresholds rather than equal time intervals. The name "Renko" comes from the Japanese word "renga," meaning "brick" – and that's exactly what these charts display: a series of bricks (or boxes) that represent price changes of a fixed amount.
Unlike traditional candlestick or bar charts where each candle represents a fixed time period (like 1 hour or 1 day), Renko charts only draw a new brick when price moves by a predetermined amount. Moves below the selected threshold are omitted. The chosen source frequency and brick size affect the picture; omitted fluctuations may still matter to risk.
How to Use This Renko Chart Generator
- 1
Upload Your OHLC Data
Export historical price data from your broker or trading platform in CSV format. The file must contain columns for date, open, high, low, and close prices. Download our sample file to see the exact format required.
- 2
Choose Renko Type
Choose a fixed size or one retrospective size from the latest simple average of true ranges. The latter is not a dynamically updated, causal indicator.
- 3
Configure Brick Size
For Traditional Renko, set the brick size in price points (e.g., $1 per brick). For ATR-based, set the ATR period (typically 14) and multiplier (typically 1-2x).
- 4
Analyze the Chart
Review the generated Renko chart to identify trends, support/resistance zones, and potential entry/exit points. Green bricks indicate upward movement, red bricks indicate downward movement.
- 5
Export Brick Data
Download synthetic grid levels and observation dates. Dates identify source observations, not exact intrabar execution times. Never assume orders can fill at brick prices.
Why Use Renko Charts for Trading?
Clear Trend Identification
Same-colored bricks summarize movement under the selected size. Their sequence does not predict whether a trend will continue.
Noise Reduction
Omits moves smaller than the chosen threshold. It also hides timing and some adverse price movement; signals can still be false.
Support & Resistance
Inspect repeated grid levels as a visual hypothesis. Grid anchoring and brick size change those levels; they are not confirmed support or resistance.
Reversal Signals
A color change records a two-brick move against the previous direction. It describes past movement, not a reliable entry signal.
Retrospective Size Estimate
The latest simple true-range average sets one size for the full chart. New observations can redraw the past; no signal-quality guarantee follows.
Export & Inspect
Export synthetic bricks for inspection. Use actual market prices and a causal signal process for execution simulations; these bricks are not a fill ledger.
Renko Charts vs. Candlestick Charts
| Aspect | Renko Charts | Candlestick Charts |
|---|---|---|
| Time Factor | Unequal elapsed time between bricks | Based on fixed time intervals |
| New Bar Trigger | Fixed price movement | Time period completion |
| Noise Filtering | Omits moves below its thresholds | Summarizes OHLC within each interval |
| Trend Clarity | Depends on source and brick size | Preserves regular interval context |
| Representation | Synthetic price-threshold grid | Interval price summary |
Reference: TradingView explains Renko thresholds and synthetic-price backtest limits. This standalone implementation does not promise identical bricks to a platform with different source data or anchoring.