Rounding Bottom
A rounding bottom, or saucer, is a slow, U-shaped reversal pattern where a long decline gradually flattens and turns into an advance. It is best seen on weekly charts, and it is confirmed when price breaks above the high where the decline began.
Some bottoms are sharp V-shapes; others take months as selling slowly dries up and buyers gradually return. The rounding bottom captures that slow shift in sentiment. It is a long-term pattern, which makes it less exciting but often more meaningful than quick reversals. This entry explains its parts, how it is confirmed and how traders set targets.
- Category
- Price Action
- Reading time
- 4 min
- Also called
- Saucer bottom, Rounding bottom pattern, Rounded bottom
- Updated
The rounding bottom in plain words
The rounding bottom is a long-term reversal pattern best suited to weekly charts, and it is also called a saucer bottom.1
The decline into the low and the advance out of it should take roughly the same time; a very sharp rise makes the pattern questionable.1
Some patterns, such as dormant bottoms and broadening tops, can take many months to form.2
How to identify a rounding bottom, step by step
Prior decline
A downtrend leading into the pattern. See Trend.
Gradual flattening
The low should take weeks, not days.
Gradual advance
The right side mirrors the left in time.
Watch volume
Often low at the bottom and rising on the advance. See Volume.
Breakout
A move above the reaction high where the decline began.
Set the target
Often the pattern's depth added to the breakout.
Worked examples
Example 1 — The breakout level
Breakout above $60A decline starts at $60, bottoms at $42 after 5 months and recovers to $60 over 5 months.
| Reaction high | $60 |
| Low | $42 |
| Confirmation | Break above $60 |
Bullish confirmation comes when price breaks above the reaction high at the start of the decline.1
Example 2 — Measured target
Target $78Same pattern: depth $60 − $42 = $18.
| Depth | $18 |
| Target | $60 + $18 = $78 |
Adding the depth to the breakout is a common way to estimate an objective.
Example 3 — Too sharp
More of a VA stock falls for 6 months, then rebounds to its old high in just 3 weeks.
| Left side | 6 months |
| Right side | 3 weeks |
When the advance is much faster than the decline, the rounding bottom's validity is in doubt.1
Rounding bottom vs V-bottom
| Aspect | Rounding bottom | V-bottom |
|---|---|---|
| Shape | Gradual U | Sharp V |
| Time to form | Months | Days to weeks |
| Best chart | Weekly | Daily or intraday |
| Sentiment shift | Slow | Abrupt |
How traders use rounding bottoms
Long-term entries
Positioning for a new uptrend. See Trend.
Confirming a base
A long base after a bear market. See Bear Market.
Breakout trades
Buying the break above the reaction high. See Breakout Trading.
Cup patterns
The rounded shape forms the cup in cup-and-handle. See Cup and Handle.
Advantages and disadvantages
Advantages
- Reflects a durable shift in sentiment.
- Clear confirmation level.
- Suits long-term investors.
Disadvantages
- Takes months to complete.
- Easy to see in hindsight, hard in real time.
- Breakouts can stall at old resistance.
Going deeper
Read as far as you need. Each level builds on the one before it.
Not always the lowest low
Beginner
Ideally the pattern's low is a new low, but sometimes the true low came months earlier and the stock traded flat before the saucer formed.1
Selling climaxes
Intermediate
Because the decline is long, a selling climax can create a spike lower within the bottom, which does not invalidate the pattern.1
Reversal or not
Advanced
Reversal patterns signal a change of trend, but a pattern forming after a decline is not automatically a reversal; volume and indicators must support it.2
Common mistakes
Buying before the breakout
The base can drag on for months.
Calling a V a saucer
Symmetry in time matters.
Using daily charts only
Weekly charts show it best.
Ignoring volume
Rising volume on the advance adds conviction.
Check your understanding
Test yourself before moving on. Each answer comes with an explanation.
Key points to remember
- A rounding bottom is a slow U-shaped reversal.
- It is also called a saucer bottom.
- It is best seen on weekly charts.
- The decline and advance should take similar time.
- Confirmation is a break above the reaction high.
Frequently asked questions
How long does a rounding bottom take?
Is there a rounding top?
Is a rounding bottom bullish?
Further learning
- Cup and Handle
A rounding bottom with a handle.
- Double Top and Double Bottom
A faster bottom pattern.
- Breakout Trading
Trading the confirmation.
- Reversal
What the pattern signals.
Sources
This article is written in our own words. The sources below support the specific facts, rules and figures marked with a number in the text. Links open the original publisher’s page.
- StockCharts ChartSchool. Rounding Bottom (opens in a new tab) Checked .
- StockCharts ChartSchool. Introduction to Chart Patterns (opens in a new tab) Checked .
Read more elsewhere
- Trading Metrics (our sister site): Rounding Bottom (opens in a new tab)
Educational content, not financial advice. Examples use hypothetical prices and simplified costs; actual fees, margin rules and regulations vary by broker, market and country. Trading Metrics is our sister site, under the same ownership; we are not affiliated with any other publisher linked above. Last reviewed . Report an error or request a source credit.