Rounding Top — \"Quiet Distribution\" That Usually Breaks Upward

The rounding top has a ready-made narrative: price gently flattens out, the dome builds, "smart money is quietly handing supply to retail." It sounds like Wyckoff for the masses and looks great in a post captioned "distribution in progress." There's just one problem: the data say this pattern breaks out upward more often than downward.

In Thomas Bulkowski's data (over 950 cases, US stocks, bull market) the rounding top breaks upward in 53% of cases. More than one in two "distribution tops" turns out to be a pause in an uptrend. And what a pause: an upward breakout from this pattern has rank 2/39 — second place in the entire catalog of bullish patterns — with a 9% failure rate and an average rise of 55%. A downward breakout? An average decline of 17%, and the measure-rule target hit in a measly 14% of cases.

The pattern is named "top," and statistically it's one of the best long setups in the catalog. This isn't an article about the rounding top not working. It's an article about the fact that it does work — just not the way the legend claims.

How to Identify a Rounding Top

Bulkowski's identification criteria:

1. An uptrend before the pattern. Price enters the dome from below — without a prior rise, there's nothing to "round off."
2. A gentle dome — an inverted bowl, the shape of a half-moon reflected in a mirror. Price gradually loses momentum, flattens out and gently reverses. A sharp peak with a violent reversal is a V-top, a completely different animal.
3. Rims at a similar level. The start and end of the dome sit close together in price, though in 58% of cases the right rim ends up slightly higher than the left. A note from the measurements: when the right rim is markedly above the left, the pattern performs worse.
4. Size: large. The pattern builds slowly enough to be visible on both the daily and weekly chart. A few-candle "little dome" on the M15 is not the rounding top these statistics describe.
5. Confirmation — and here's the key asymmetry: an upward breakout is a close above the dome's highest point; a downward breakout is a close below the lower of the two rims (the pattern's lowest low). Until one of these happens, the pattern says nothing about direction.

What the Numbers Say (Bulkowski, Encyclopedia of Chart Patterns)

Terms in brief: failure rate (break-even failure rate) — how often price, after a confirmed breakout, didn't even move 5% in its direction; average move — from breakout to extreme before a 20% correction, on perfect trades; throwback/pullback — a return to the breakout line within 30 days; target % — how often price reaches the measure-rule target.

Rounding top, bull market, n>950:

Read this one carefully, because the table is more interesting than it looks.

The bullish side: rank 2/39 is elite territory in the catalog. A 9% failure rate, an average move of +55% — better than the double bottom, better than the inverse head and shoulders. A "distribution" pattern that, after breaking upward, is one of the strongest continuation signals in the measurements.

The bearish side: rank 3/36 looks great — and this is where a note on methodology is needed. Bulkowski's ranking combines several metrics (including failure rate and average move relative to other bearish patterns), and declines in a bull market are generally shallow. An average decline of 17% is decent compared to other bearish patterns, but the measure-rule target reached in only 14% of cases says it plainly: projecting the dome's full height downward is fantasy. Six times out of seven, price doesn't get there.

For comparison with the bearish competition: the double top averages a 16–19% decline, head and shoulders around 22% — the rounding top's -17% falls in the same range, but it demands a much longer wait for confirmation and, more often than not (53%!), doesn't deliver a short signal at all. If you're hunting for a reversal, those other patterns give you an earlier and more frequent signal.

Standard disclaimer: US stocks, daily chart, bull market. On crypto and in a bear market these proportions could look different — no measurement exists, so we won't pretend one does.

How to Trade a Rounding Top

Rule zero: the dome is not a signal. The shape without confirmation only tells you that upward momentum has weakened. Weakened momentum resolves into… resumed gains 53% of the time. Shorting "because I see distribution" is a bet against a coin that's slightly weighted against you.

Bullish scenario (statistically the stronger one): entry on a close above the dome's highest point. Stop below the last clear low in the right-hand part of the pattern. Target: pattern height (highest point minus lower rim) × 58%, added to the peak. A throwback shows up 63% of the time — if you didn't enter on the breakout, a return to the line is a second chance; if you're already in, don't panic on the first pullback.

Bearish scenario: entry on a close below the pattern's lower rim. Stop above the last local high on the way down from the dome. Target: modest — since the measure rule only works 14% of the time, it makes more sense to aim for the nearest support or half the dome's height and take profit quickly. A pullback 58% of the time will do its work with tight stops.

Aggressive entry (Bulkowski's "32% retrace" variant): once price, after dropping from the dome, retraces 32% of the pattern's height from the low, aggressive traders buy in anticipation of an upward breakout. This is an entry before confirmation — better risk-reward, worse accuracy; you're taking on the risk that the dome finishes rounding off anyway.

Filters from the measurements: tall patterns outperform short ones; high volume on the breakout improves results; a right rim clearly above the left one is a warning sign. The dome's rims act as support after the fact.

What about "real" distribution? If you're looking for signs of supply being unloaded, the dome's shape alone isn't enough — Wyckoff-style distribution leaves specific footprints: false upward breakouts that sweep liquidity (UTAD), clear signs of supply on rallies (high volume without price progress), and breaks of support structure. A dome without those elements is simply fading momentum. A dome with them is a different article and a different, more specific thesis. Don't mix the labels: "rounding top" describes geometry, "distribution" describes mechanics, and the measurement above concerns the geometry.

Myth vs Measurement

Myth: "The rounding top is quiet distribution. Smart money spends months handing off supply, and when the dome closes out, a decline follows. See a dome — get ready to short."

Measurement: 53% of breakouts go up, and the bullish variant carries rank 2/39 and an average move of +55% versus -17% for the bearish variant. The distribution narrative loses to a simple fact: flattening out after a rise is most often a rest stop, not a goodbye. The market has no obligation to finish the dome just because it looks nice.

Where does the myth's staying power come from? The name does half the work — "top" suggests a direction before you even look at the data. Selective memory does the other half: domes followed by a decline end up on screenshots; domes that broke upward never get captioned "failed distribution." And third — the distribution narrative is unfalsifiable in real time: if price rises, "they're still distributing"; if it falls, "I told you so." A thesis that no scenario can disprove isn't analysis — it's a horoscope.

No sugarcoating: the rounding top is a solid, measurable pattern — as long as you treat it as a two-sided pattern with a bullish tilt, not a verdict on the trend. Wait for a close outside the rim, trade whichever side the market picks, and remember the statistics favor the bulls. Shorting the shape alone means betting against the table — and against the second-best bullish pattern in the entire catalog.

FAQ

Is the rounding top a bearish signal? The shape alone — no. The pattern breaks upward in 53% of cases. A bearish signal only forms after a close below the lower rim — and it's modest: an average decline of 17%, with the target reached in 14% of cases.

What if the dome breaks upward? That's this pattern's strongest scenario: rank 2/39, a 9% failure rate, an average rise of 55%. A rounding top that breaks upward is statistically one of the best long setups in Bulkowski's catalog.

Where's the confirmation? Upward: a close above the dome's highest point. Downward: a close below the lower of the pattern's two rims. Everything in between is no signal — a shape without a resolution.

FAQ

Rafał — Krypto Bez Ściemy

Trader and founder of Strefa Tradingu. He’s been breaking crypto down on YouTube for years — no hype, no signals, with a focus on market structure and risk management.

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