Composite & famousRenko
Price-driven bricks that ignore time entirely, stripping charts down to pure trend.
Works best in trending marketsEngine-computed on a fixed sample series
What a Renko chart is
A Renko chart is a way of drawing price that throws away time entirely and shows only meaningful movement, named after the Japanese word renga, meaning brick. Instead of one candle per time period, a Renko chart adds a brick only when price travels a fixed amount — the box size — in one direction, so hours of sideways drift can pass without adding a single brick. Up-bricks in one color and down-bricks in another are stacked at 45-degree angles, and a new brick in the opposite direction appears only after price reverses by a defined amount. The effect is a radically simplified chart that strips out the small wiggles and congestion that clutter candlestick charts, leaving pure trend. For a beginner, imagine ignoring the clock and only marking the chart each time price has moved a full step up or down — that is Renko, and its whole purpose is to make the trend impossible to miss.
How Renko bricks are built
You choose a box size, either a fixed price amount such as one dollar or fifty pips, or a value derived from the Average True Range so the bricks adapt to volatility. Starting from a reference price, a new up-brick is printed each time price moves at least one box size above the top of the last brick, and successive up-bricks stack as long as price keeps advancing box by box. To reverse and print a brick of the opposite color, traditional Renko requires price to move against the trend by twice the box size — one box to erase the current direction and one to establish the new one — which is what filters out minor pullbacks. Sideways moves smaller than the box size add nothing at all, and crucially the time axis is discarded, so ten bricks might represent ten minutes or ten days. The reversal threshold and box size together determine how much noise is filtered.
Reading a Renko chart, step by step
An unbroken column of same-colored bricks marching in one direction is a clean, unambiguous trend, and the longer the run the stronger the move. A change of brick color is the core signal — it means price has reversed by at least the reversal threshold, filtering out the small counter-moves that would trigger noise on a candle chart. Because time is removed, periods of indecision and choppy congestion simply vanish from the chart, so what remains reads as a series of decisive legs. Brick clusters where the chart repeatedly flips color mark zones of balance that often align with support and resistance. The simplicity is the point: you are reading direction and reversal, not the dozens of intrabar fluctuations a candlestick would show.
Best timeframes and settings
Renko is fundamentally a trend-following construction, so it suits swing and position trading, though scalpers use small ATR-based bricks on intraday data. The single most important setting is the box size: large boxes capture only major swings and produce very few, very reliable flips, while small boxes react sooner but reintroduce the whipsaws Renko is meant to remove. ATR-based box sizing lets the bricks grow in volatile markets and shrink in calm ones, adapting automatically, whereas a fixed box must be retuned as volatility changes. The underlying data timeframe still matters because bricks are usually formed from closing prices of that timeframe, so a 5-minute Renko and a daily Renko with the same box behave differently. The trade-off is stark and direct: bigger bricks mean less noise but more lag, smaller bricks mean faster signals but more false flips.
When and where to use it
Renko is at its best in trending markets, where its noise filtering lets a trend run visually uninterrupted and keeps you on the right side of the move. It is far less useful in tight ranges, where price oscillates without ever traveling a full reversal threshold, so the chart either stalls or flips back and forth at the range edges. It works across equities, futures, forex, and crypto, anywhere a clean trend can develop. The regime to avoid is a low-volatility chop where the box size is larger than the typical swing, leaving the chart frozen, or conversely a box so small the range constantly triggers flips. Because Renko discards time, it is a poor choice when the duration of a move matters to your decision, such as around scheduled news.
Strategies that use Renko
The simplest strategy trades the color: go long on the first up-brick after a down-column, go short on the first down-brick after an up-column, and place the stop a brick or two on the other side of the flip. A trend-riding strategy enters on a color flip and holds through the entire same-colored run, only exiting when the opposite color prints, which keeps you in long trends and out of noise. A support-and-resistance strategy uses horizontal levels where prior brick columns turned; a fresh flip at such a level is a higher-probability entry than one in open space. Because Renko naturally defines stops, a brick away, and trend, the current color, it lends itself to mechanical, rules-based execution — the discipline is in choosing the box size and sticking with it.
Combining Renko with other indicators
Renko pairs well with momentum oscillators applied to the Renko series itself — an RSI or MACD computed on bricks gives smoother, cleaner momentum reads because the underlying noise is already gone. Volume is trickier since Renko distorts time, but volume plotted per brick can still highlight which flips carried participation. Moving averages drawn over the bricks act as clean dynamic support and resistance and confirm the trend the colors already show. Many traders keep a standard candlestick chart alongside the Renko to recover the timing and intrabar detail Renko hides, using the candles for execution and the Renko for trend clarity. Because Renko is a charting method rather than an overlay, almost any indicator can be layered on top of it.
Where Renko fails
The defining weakness is lag at the live edge — because a brick only completes when price has moved a full box, the last brick can sit well behind the current price, so you may act on a flip only after a chunk of the move is gone. Choosing too small a box reintroduces exactly the whipsaws Renko exists to remove, flipping color on noise and generating losing signals in a range. The time-agnostic axis hides how long a move actually took, which can mislead traders who need duration context. Some Renko implementations also shift the most recent brick as price moves, creating a false impression of past signals that were not actually available in real time. The fixes are to size boxes to the instrument's volatility, avoid ranges, and always remember the last brick is provisional until price confirms it.
A worked example
Take a stock trading at 100 dollars with a fixed Renko box size of one dollar and the traditional two-box reversal. As price rises to 101 the chart prints an up-brick, and at 102 it prints another, so the column shows a clean advance. Price then stalls and drifts between 101.50 and 102.40 for two hours — none of that adds a brick, because no full box has been traveled beyond the last brick. To flip the color from the top of the 102 brick, price must fall two boxes, to 100; when it finally does, a single down-brick appears, signaling a reversal of at least two dollars. A Renko trader who was long from the up-column exits on that down-brick near 100 and may reverse short, placing a stop one brick back at 101. Notice how the sideways two-hour drift left no trace at all — Renko showed only the two moves that mattered.