Rounding Top

The rounding top — also called an inverse saucer or dome pattern — is a bearish reversal pattern that unfolds over weeks to months as buyer conviction gradually deteriorates and sellers take control. Unlike sharp reversals such as the head and shoulders or double top, the rounding top doesn’t produce a distinct peak and breakdown. Instead, it traces a smooth arc of progressively lower highs that mirrors the rounding bottom’s bullish structure. The pattern is most reliable on daily and weekly charts of large-cap stocks, sector ETFs, and major indices — particularly in late bull-market phases when sector leaders have been advancing for 12-18 months.

How to Identify a Rounding Top

1. Left slope with strong volume — Price advances with a series of higher highs, with volume running at or above the 30-day average. This is the continuation of the prior uptrend. The advance typically spans 4-12 weeks on daily charts.

2. Apex: narrow range, volume dryup — Price enters a choppy, low-directional zone at the top of the arc. This is the critical diagnostic: volume contracts sharply to 30-50% of the average volume seen during the left-side advance. Low-volatility, overlapping candles with no clear trend define the apex. Duration is typically 3-8 weeks.

3. Right slope: lower highs, recovering volume — Price begins making lower highs in a smooth arc that mirrors the left side. As distribution accelerates, the right slope is often steeper than the left slope. Volume begins recovering — watch for above-average volume days on down moves.

4. Neckline: horizontal support — Draw a horizontal line connecting the two base lows that flank the arc. These are the pullback lows formed before the left-side rally and after the right-side decline. The neckline should be roughly horizontal; a sharply sloping line suggests a different pattern such as a rising wedge.

5. Confirmation: neckline break on volume — The only valid entry trigger is a daily close below the neckline with volume at least 1.3x the 20-bar average. A weak-volume break has a significantly higher false-breakdown rate.

Entry Rules

1. Wait for the neckline close — Enter short only after a daily candle closes below the neckline. Never short the apex because the pattern can extend for weeks or months, and early shorts face unlimited time-in-trade risk.

2. Require volume confirmation — Volume on the neckline break day must be at least 1.3x the 20-bar average. Ideally, the break day closes in the lower half of its range with no long lower wick — this signals sustained selling pressure rather than a spike reversal.

3. Entry execution — Enter short at the open of the session following the confirmed close below the neckline, or scale in on a retest of the neckline from below (former support acting as resistance). Retest entries offer tighter stops but occur in fewer than 40% of breakdowns.

4. Abandon false breakdowns immediately — If price closes back above the neckline within two sessions, exit the short. The pattern has failed for now; do not hold through a reclaim.

Exit Rules and Targets

1. Primary target: measured move — Subtract the pattern height from the neckline breakout price. Calculate pattern height as the distance from the apex high to the neckline. This is the primary target.

2. Partial cover at 50% of measured move — Take off 30-50% of the position when price reaches the halfway point to the target. This locks in gains and reduces emotional pressure during consolidation phases.

3. Secondary target: next major support — Identify the next structural support level below the measured move. If there is a clear prior consolidation zone, that becomes the secondary target for the remaining position.

4. Trailing stop after 20% progress — Once price moves 20% of the way from entry to target, begin trailing the stop using the 10-bar highest high. This protects gains while allowing the full measured move to develop.

5. Time-based exit — If price stalls for more than 15 trading sessions without reaching the 50% partial cover level, reassess the thesis. Slow, grinding declines that stall may signal the pattern is failing.

Target Calculation: Measure the vertical distance from the apex high to the neckline. Subtract that amount from the neckline price. If the apex peaked at $222 and the neckline sits at $155, the height is $67 and the target is $155 minus $67, equaling $88. Bulkowski’s data shows the average post-breakdown decline is approximately 31% from the neckline — use this as a sanity check when the measured move produces an extreme target.

Stop Loss Placement

Place the initial stop 0.5-1.0% above the neckline breakout level. For a neckline at $155, this means a stop near $156.55-$157.55. This positioning invalidates the trade if sellers fail to follow through — a close back above the neckline is the clearest signal that the breakdown has failed. At the $155 neckline with a $162 stop example, risk is $7 per share against a $67 measured move target, producing a 9.6:1 reward-to-risk ratio. Even at the Bulkowski average decline of 31% (approximately $48 from a $155 neckline), the R:R remains above 6:1 — one of the most favorable risk profiles among bearish reversal patterns.

Practical Example

On the daily chart of NVDA (used here as a representative large-cap semiconductor with high institutional participation), a rounding top structure forms over approximately 7 months. The left slope runs from $150 to $222 over 4 months as the stock leads the sector on 45M+ daily share volume. Price then enters an apex phase between $210 and $225 for 6 weeks — daily volume drops to roughly 18M shares, about 40% of the left-slope average, a textbook volume dryup. The right-side decline develops over 3 months as price fades from $220 to $160, with volume picking back up on the larger down days.

The neckline connects the two base lows at $153 and $157, placing it at $155. On the confirmation day, price closes at $153.50 on volume of 58M shares — well above the 20-bar average of 38M. A trader enters short at the next session’s open of $154.

• Entry: $154
• Stop: $162 (just above neckline)
• Risk per share: $8
• Pattern height: $222 minus $155 = $67
• Measured move target: $155 minus $67 = $88
• Reward per share: $66
• R:R: 8.25:1

On a $25,000 account with 1% risk ($250), position size is 31 shares. At target, profit is approximately $2,046.

Best Timeframes for Rounding Top

The rounding top is primarily a daily and weekly chart pattern. On the daily chart, Bulkowski’s sample showed pattern duration ranging from 2 months to over a year with a median of approximately 5 months — long enough to filter out noise while short enough to remain actionable. On the weekly chart, the pattern carries the same structure but individual signals arrive less frequently and confirmation takes longer. On timeframes under the daily, the pattern loses statistical edge because the arc reflects crowd psychology shifts that require institutional distribution over time, not single-session selling.

The 65-70% success rate cited by Bulkowski applies specifically to daily chart patterns confirmed by neckline break with volume. Intraday rounding tops — visible on 60-minute or 15-minute charts — should be treated as minor context signals only, not primary setups. The descending triangle is a more reliable intraday bearish pattern for shorter timeframes.

Common Mistakes

1. Shorting the apex — The most expensive mistake. At the apex, neither bulls nor bears have clear control, and price can chop for weeks before resolving. Premature shorts get stopped out repeatedly, accumulating losses before the real breakdown occurs. The only valid entry is on neckline break.

2. Entering on low-volume neckline breaks — A neckline break on below-average volume is a warning flag, not a green light. Without institutional selling behind the break, the pattern has a significantly higher rate of reversal back above the neckline. Require at least 1.3x the 20-bar average volume.

3. Drawing the neckline through price action — The neckline must connect clear support lows, not be drawn through candle bodies or midpoints. Sloppy neckline placement leads to early entries and wider stops that destroy the R:R advantage.

4. Holding through a neckline reclaim — If price closes back above the neckline on a closing basis, the trade is wrong. Exit immediately. Rationalizing a hold leads to maximum-loss outcomes.

5. Skipping partial profit-taking — The measured move on a rounding top can be 30-50%+ below the neckline — a multi-month journey. Without partial covers, traders either exit too early out of anxiety or hold through major retracements. Partial profit at the 50% mark of the measured move is non-negotiable position management.

How to Journal Rounding Top Trades

Rounding top trades unfold over weeks, which makes disciplined journaling especially important for tracking whether the setup genuinely matched the criteria at entry.

Journal Field	What to Record	Why It Matters
Pattern Type	Rounding Top	Filter and review all rounding top trades separately
Pattern Duration	Trading days from left base to right base	Longer patterns produce more reliable breakdowns
Apex Volume	% of left-slope 30-day average volume	Verify the 30-50% dryup that defines a genuine setup
Neckline Break Volume	Multiple of 20-bar average (e.g., 1.5x)	Distinguish high-probability from low-probability entries
Entry Timing	Neckline break / Retest / Apex (mistake)	Identify whether early entries drag down overall stats
Right-Slope Asymmetry	Steeper / Same / Shallower than left slope	Steeper right slopes signal stronger distribution
False Breakdowns	Count before confirmed entry	Track how many fakeouts preceded the real break

After logging 50 or more rounding top trades in JournalPlus, filtering by “Apex Volume under 40%” and “Neckline Break Volume above 1.3x” reveals which setups consistently produce the measured move versus which ones fail early. JournalPlus’s tagging system lets traders flag each trade with setup quality ratings and then compare win rates across quality tiers — turning anecdotal pattern recognition into a statistically grounded edge over time.

Internal links: measured move | wyckoff accumulation | volume analysis in glossary | swing trading strategies