• A Renko chart is a price-only charting method (developed in Japan) that builds “bricks” (or “boxes”) when price moves by a specified amount. Bricks are placed at a 45° angle to the right of the prior brick and are typically colored to show direction (e.g., green/white for up, red/black for down).
– Unlike candlestick or bar charts, Renko ignores fixed time intervals. A brick forms only after the price has moved the chosen box size and closed beyond the prior brick’s boundary, so one brick might take minutes to form or months—depending on price action.
Key takeaways
– Renko filters noise to emphasize trend: it reduces small intra-period fluctuations and highlights sustained directional movement.
– A brick is only created when price moves the box size from the top/bottom of the previous brick; once drawn a brick is not removed.
– Box size selection (fixed amount or ATR-based) strongly affects signal frequency and smoothness: smaller boxes = more signals/noise; larger boxes = fewer signals/lag.
– Use Renko with additional tools (support/resistance, moving averages, momentum indicators, stops) because Renko omits time and intra-period highs/lows.
What a Renko chart tells you (how traders read it)
– Trend direction: long runs of same-colored bricks indicate a strong trend.
– Possible pullbacks: one or two opposite-colored bricks inside a longer trend can indicate a pullback (potential re-entry).
– Potential reversals: sustained alternation to opposite-colored bricks often signals a trend change.
– Support and resistance: because noise is reduced, horizontal levels where brick direction repeatedly changes are easier to spot.
How Renko bricks are constructed (brief mechanics)
– Choose a box size (e.g., $0.25, $2, 50 pips, or ATR-based).
– If price closes at or beyond the prior brick’s top + box size → draw an up brick to the right.
– If price closes at or below the prior brick’s bottom − box size → draw a down brick to the right.
– Intervening highs/lows that do not cross the box threshold are ignored; bricks are based on closes.
Practical example (numeric)
– Stock at $10 with box size $0.25:
• Price closes at $10.25 → one up brick is drawn.
• Price then closes at $10.50 → another up brick.
• If price falls back to $10.25, no down brick is drawn; price must fall to $10.00 (a full $0.25 below the previous brick bottom) for a down brick.
Using Renko charts — practical trading steps
1. Choose a box size
• Fixed amount: choose a tick/price increment relative to the asset’s volatility (examples below).
• ATR-based: use an Average True Range (ATR) value (e.g., ATR(14)) as box size or as a multiplier (ATR-based adapts as volatility changes).
2. Identify the dominant trend
• If many consecutive up bricks → bullish trend; many consecutive down bricks → bearish trend.
3. Entry rules (examples)
• Trend-following: enter long after a new up brick appears following at least one opposite brick (some traders wait for 2 consecutive up bricks).
• Pullback entry: in an uptrend, buy when a single or double down brick (pullback) is followed by an up brick.
4. Exit rules / stops
• Place stop-loss just below the last significant swing low (for longs) or above the swing high (for shorts).
• Alternatively, exit when an opposite-colored brick forms (or after 2 opposite bricks for fewer whipsaws).
5. Confirmation & filters
• Use a moving average (e.g., 50-EMA) plotted on price or on a time-based chart as confirmation of the Renko trend.
• Use momentum indicators (RSI, MACD) or volume (volume is not part of Renko bricks; show a separate volume pane).
6. Position sizing & risk management
• Because Renko signals can lag, control position size and use fixed-dollar or % stops.
7. Backtest your parameters
• Test different box sizes and entry/exit rules over historical data to identify what matches your timeframe and risk tolerance.
Choosing the box size — practical guidance
– Fixed box: select based on asset price and volatility:
• Low-price stocks or low-volatility assets: small absolute box (e.g., $0.10–$0.50).
• Mid/high-price stocks: $1–$5 or a percentage (0.5%–2% of price).
• Forex: use pips (e.g., 20–50 pips for many currency pairs).
– ATR-based: set box size = ATR(n) (commonly n = 14) or use ATR × multiplier (e.g., 0.5× ATR to increase sensitivity).
– Rules of thumb:
• Start by calculating average true range for your desired timeframe and choose box size around that value or a fraction of it.
• Visually inspect resulting brick density: aim for a balance where trend is clear but signals aren’t too infrequent.
– How to test: change the box size and check how many bricks form in a given historical period (too many = noisy; too few = late).
Renko vs Heikin Ashi — differences and when to use either
– Construction:
• Renko: fixed box size (or ATR) based solely on price moves beyond brick thresholds; ignores time.
• Heikin Ashi: candles recalculated using averages of open/high/low/close; each candle represents a time interval and is smoothed by averaging.
– Use cases:
• Both highlight trends and reduce noise. Use Renko when you want price-movement-based bricks that ignore time; use Heikin Ashi when you want smoother, time-based candlesticks that still show trend momentum.
– Data shown:
• Heikin Ashi retains time structure and shows variable-sized candles; Renko hides intra-period detail and uses identical-size bricks.
Limitations and cautions
– Time information is lost — a single brick could represent a long or short time span.
– Highs and lows within a period are ignored; only close-based thresholds count. Price can move significantly intraday before a brick appears.
– False signals / whipsaws can occur, especially with small box sizes.
– Renko can lag big rapid reversals because a full box move must occur before a reversal brick is printed.
– Not ideal alone — always combine with stops, confirmation indicators, volume/time-based charts, and risk controls.
How to set up a Renko chart — Thinkorswim (practical steps)
(Thinkorswim desktop; exact labels may vary by software version)
1. Open Thinkorswim and go to the Charts tab.
2. Click the time axis/dropdown (where you normally choose timeframes) to open Time Axis settings.
3. In the Time Axis/Chart settings, change Aggregation type to “Range.”
4. Choose “Renko Bars” as the Range type (or select Renko under available range aggregation choices).
5. Set the Price Range to your desired box size (e.g., 0.25, 2.00). This value equals the Renko box size.
6. Apply and view the chart. Add indicators and adjust styling as needed.
Notes:
– Thinkorswim Renko bars are typically built from closing prices consistent with Renko rules — confirm exact platform behavior in your version.
How to set up a Renko chart — TradingView (practical steps)
(TradingView web/desktop; menu labels may vary slightly)
1. Open TradingView and load a chart for the desired ticker.
2. Click the chart type or interval menu (commonly shows “Candles” or a timeframe).
3. From the chart type list, choose “Renko” (it may be listed under “More” or a dropdown of aggregation types).
4. Open the Renko settings (gear icon). In Inputs:
• Choose “Source” (Close is common).
• Choose “Box size” mode: Fixed (specify numeric box size) or ATR (specify ATR length and multiplier).
• Enter the numeric box size or ATR parameters (e.g., Box = 2, or ATR length = 14 with multiplier).
5. Apply settings; adjust style/colors and add indicators (volume, EMA, RSI) in separate panes as needed.
Notes:
– TradingView’s Renko settings also let you switch between price-based fixed boxes and ATR-based boxes; you can experiment with both.
– If you are unsure whether Renko is available on your account tier, check TradingView’s chart type availability or help docs (most standard chart types are generally accessible).
Practical setup checklist (before trading live)
– Decide fixed vs. ATR box-size approach and set a number.
– Test visually and by backtesting to confirm brick frequency fits your strategy/timeframe.
– Add confirmation indicators (moving average, RSI, MACD) and volume (volume won’t affect bricks but provides extra info).
– Define clear entry, stop, and exit rules (how many bricks to wait for? where to place stops?).
– Use proper risk management and position sizing.
Final tips
– Use Renko for trend-following strategies and for clearer support/resistance detection.
– Combine Renko with time-based charts: view Renko for trend signals and a time-based chart to watch intra-period action and volume.
– Re-evaluate box size periodically if market volatility shifts significantly.
Sources and further reading
– Investopedia — “Renko Chart” (overview and examples):
– Thinkorswim / Charles Schwab help documentation (search “Renko Bars” or “Range bars” for platform-specific steps).
– TradingView Help Center — chart types and Renko settings (search “Renko chart TradingView”).
Editor’s note: The following topics are reserved for upcoming updates and will be expanded with detailed examples and datasets.