Direct Answer
A Darvas box is a rectangular price range drawn around a consolidation, named after Nicolas Darvas. It is commonly built from a new high that holds for several sessions, with the lowest low over the same stretch forming the bottom. A close above the box top is read as a breakout from the consolidation and a close below the bottom as a breakdown.
Darvas Box: Formula, Meaning, Signals, Examples and How to Use It
How Is Darvas Box Calculated?
A Darvas box is a rectangular price range drawn around a consolidation, named after Nicolas Darvas. It is commonly built from a new high that holds for several sessions, with the lowest low over the same stretch forming the bottom.
Formula: Box top = a high not exceeded for the next 3 sessions; box bottom = lowest low over those sessions (implementations vary)
Inputs:
- Daily highs and lows
- Number of confirming sessions (commonly 3)
- Rule for the box bottom
Reading it. A close above the box top is read as a breakout from the consolidation and a close below the bottom as a breakdown. A tall box means a wide consolidation, a short one means a tight range.
Limits. Implementations differ in how the top and bottom are set, so boxes on different platforms may not match. Boxes are defined after the fact, and breakouts from them often fail.
What is Darvas Box?
A Darvas box is a rectangular price range drawn around a consolidation, named after Nicolas Darvas. It is commonly built from a new high that holds for several sessions, with the lowest low over the same stretch forming the bottom.
How to use Darvas Box
A close above the box top is read as a breakout from the consolidation and a close below the bottom as a breakdown. A tall box means a wide consolidation, a short one means a tight range. A reading alone is never a buy or sell signal; it needs context from price structure, volume, volatility and the broader market regime.
Strengths
- The box turns a loosely described consolidation into explicit top and bottom levels set by prices that held for a stated number of sessions.
- Requiring the top to survive several sessions screens out a one-day spike as a candidate ceiling.
- Reproducible when the formula and data convention are fixed.
Weaknesses and limitations
- The confirmation count is a free parameter: a larger number delays every box, and a smaller one lets a one-day high define the top.
- Both edges use daily highs and lows, so overnight gaps can place a box edge at prices that rarely traded.
- Correlated indicators can create false confidence by repeating the same underlying information.
Editorial and risk note
This page is educational content, not individualized investment advice. It should not imply guaranteed prediction, accuracy or outperformance.
Frequently Asked Questions
Is Darvas Box a buy or sell signal?
No. A close above the box top is read as a breakout from the consolidation and a close below the bottom as a breakdown. Implementations differ in how the top and bottom are set, so boxes on different platforms may not match. A trade built on it still needs a trigger, an invalidation rule, a position size and realistic execution assumptions.
What is the best setting for Darvas Box?
Darvas Box is computed from daily highs and lows; number of confirming sessions (commonly 3); rule for the box bottom, so the choices that matter are the data convention and the window it is read over. Test those across instruments, regimes and out-of-sample periods instead of fitting one historical winner.
Can Darvas Box be used by itself?
Implementations differ in how the top and bottom are set, so boxes on different platforms may not match. Boxes are defined after the fact, and breakouts from them often fail. For that reason it is read next to measures of direction, participation, valuation, liquidity and risk, not alone.
Does Darvas Box work on every timeframe?
The calculation (Box top = a high not exceeded for the next 3 sessions; box bottom = lowest low over those sessions (implementations vary)) can be run on any bar size, but behavior is not portable: a reading on a five-minute chart describes a very different market window from the same reading on a daily chart. Validate the exact timeframe before relying on it.
Why does Darvas Box give false signals?
The confirmation count is a free parameter: a larger number delays every box, and a smaller one lets a one-day high define the top. Both edges use daily highs and lows, so overnight gaps can place a box edge at prices that rarely traded. Lag, noise and regime changes add to this, because market participants react to new information after the reading is calculated.
How should Darvas Box be backtested?
Rebuild Darvas Box from daily highs and lows using point-in-time data, write the rules before testing, include delisted securities where relevant, model realistic fills and costs, reserve a validation sample and compare with a simpler baseline.