FAMOUS STRATEGIES

Box Theory

Nicolas Darvas · 1950s. Tracking stocks as they consolidate inside price "boxes", buying breakouts above the box on rising volume and placing stops just beneath it.

← All famous strategies

Classification: published rulebook. Rulebook: Darvas described a specific, repeatable box-construction, entry and stop procedure in his own book, so it can be written down and tested. The entry, exit and stop-loss sections below describe documented rules.
ORIGIN

Where it comes from

Nicolas Darvas (1920–1977), a Hungarian-born professional dancer, described his method in How I Made $2,000,000 in the Stock Market (1960). He followed stocks while travelling, using price and volume, and developed a visual "box" framework to decide when a rising stock had resumed its advance. He also paid attention to which industries were strong.

Core principles

Focus on stocks making new highs on strong volume.
Define a box: a tight range that price respects.
Enter only when price breaks above the top of the box.
Place the stop just under the box, and trail it under each new, higher box.
Be selective, or step aside, when the overall market is weak.
AT A GLANCE
RULEBOOK

Nicolas Darvas

1950s

Well documented and publishable as a rule set. You can write it down, test it and follow it step by step.

Defined risk at every entry
HOW IT WORKS

The method in plain terms.

A documented rule set, summarised for education.

Darvas looked at stocks trading at or near new highs on heavy volume. When one pulled back, he drew a box: the top is the high that price failed to exceed for several consecutive days, and the bottom is the low of the following pullback that also held for several days.

A break above the top of the box marks the breakout. As the stock climbs it forms new, higher boxes, and the position is held as long as each new box holds.

Volume and industry strength were supporting evidence, not stand-alone signals.

ENTRY

Entry rules

Screen for stocks near new highs (commonly a 52-week high) with a surge in volume.
Wait for a confirmed box: a top that holds for about three sessions, then a bottom that holds for about three sessions.
Buy only when price breaks above the top of the box (Darvas used buy-stop orders just above it).
Prefer stocks in strong industry groups and a healthy overall market.
EXIT

Exit rules

Sell when price falls below the bottom of the current box.
As new, higher boxes form, the exit level rises with them.
Step aside when the overall market turns decisively weak. Darvas describes doing this in his own account.
PROTECTION

Stop-loss rules

Place the initial stop just below the bottom of the box at the time of purchase.
Raise the stop to just below the bottom of each newly formed box, and never lower it.
Enter the stop with the broker when you buy, rather than deciding later.
RISK

Risk management

Trade risk is the distance between the entry and the box-bottom stop. Size the position so that this distance equals your fixed risk limit.
Narrow boxes give tight, cheap stops. If a box is so wide that the stop does not fit your risk limit, skip the trade.
Limit the number of simultaneous positions and avoid concentrating in one industry.
Expect false breakouts. Several small stopped-out trades are normal.
WORKED EXAMPLES

One that worked, one that failed.

Both charts are schematic drawings of the idea. They are illustrative scenarios, not recorded trades or real market data.

SUCCESSFUL EXAMPLE

Illustrative winner: rising boxes in an advancing stock

Illustrative winner: rising boxes in an advancing stock: schematic price line with entry, exit and stop markers. Not real market data.StopEntryExitEntry: break above box topExit: below latest boxStop: just under boxSchematic only. Not real market data.

A stock on strong volume forms a tight box, breaks out, and then forms a second, higher box.

Entry
Buy the break above the first box top, with the stop just under the box bottom.
Exit
The stop trails up under each new box. The position is exited when price drops below the latest box bottom.
Stop-loss
Initial stop sits just under the first box bottom and is raised with each new box.
Lesson
Trailing under each new box lets a winner run while the risk stays defined.
FAILED EXAMPLE

Illustrative loser: breakout fails in a weak market

Illustrative loser: breakout fails in a weak market: schematic price line with entry, exit and stop markers. Not real market data.StopEntryExitEntry: break above box topExit: stopped below boxStop: just under boxSchematic only. Not real market data.

Price breaks above a box top, but the overall market turns down and price falls straight back through the box.

Entry
Buy the breakout above the box top.
Exit
Stopped out just below the bottom of the box.
Stop-loss
The stop was placed at the time of purchase, so the loss is the planned one.
Lesson
Defined risk turns a failed breakout into a small, planned loss.
WHEN IT FITS

Suitable market conditions

Rising markets with clear leadership and strong volume.
Stocks in strong, trending industry groups.
Liquid stocks where a stop order fills close to its level.
WHERE IT STRUGGLES

Limitations

The approach is built for buying stocks in rising markets. The original method was not designed for shorting.
Boxes are somewhat subjective: different traders can draw different boxes.
A gap down can jump past a stop, so the realised loss can exceed the plan.
A breakout that is obvious to everyone can also fail more often.
AVOID

Common mistakes

Drawing boxes after the fact to fit a chart.
Buying before the top of the box is exceeded.
Moving the stop down to avoid being stopped out.
Ignoring volume and the direction of the overall market.
Chasing entries when the box is very wide.
PRACTICE

Practice checklist

☐ Mark boxes on historical charts using written construction rules (how many sessions the top and bottom must hold).
☐ Compare breakout-day volume with the recent average.
☐ Compute the stop distance and position size before entry.
☐ Record every false breakout as well as the winners.
☐ Confirm the overall market trend before acting.

Frequently asked questions

How many days confirm a box?
It is commonly summarised as about three sessions for the top and again for the bottom, but sources present the details differently. Read Darvas's own account and write your own version before testing it.
Does it work for forex or indices?
The original method was for stocks. A box is a consolidation-breakout idea that could be tested elsewhere, but that would be your own adaptation.
Is a Darvas box just a support and resistance zone?
It is related but more rigid: the top and bottom are defined by highs and lows that held for a set number of sessions.
SOURCES

Where to read more.

Plain-text references for further reading. Check specifics against the original material before relying on them.

Nicolas Darvas — How I Made $2,000,000 in the Stock Market (1960)
Nicolas Darvas — Wall Street: The Other Las Vegas (1964)
Educational reference only. TCT does not teach, sell or recommend this strategy. Descriptions are summaries of publicly known approaches, the examples are illustrative, and past performance of any trader or system does not indicate future results. Trading involves risk of loss.