An invented price line: a slow fall that flattens, turns and becomes a slow rise, like a bowl, outlined by a curve under the bowl and a level across its rim.
An invented chart, drawn to show the shape of a rounding bottom. Not market data.
Also searched assaucer bottom · rounded bottom · bowl pattern · rounding bottom chart pattern
How to recognise a rounding bottom
- A fall that slows instead of ending in a spike.
- A flat stretch at the bottom, with small candles.
- A rise on the other side that roughly mirrors the fall.
- It takes a long time. Textbook examples are drawn on daily or weekly charts and run for months.
What it is taken to mean
It is read as a gradual change of mood. Sellers tire slowly, nobody is in a hurry at the bottom, and buyers return by degrees. A close above the rim is taken as the completion of the turn.
That is a reading, and no more. A pattern is a description of what a price did, not a forecast of what it will do. Textbooks file this one under “reversal shapes”, which is a habit of naming and not a rule the market keeps.
How it is conventionally measured
The textbook measure is the depth of the bowl, from its lowest point to the rim, taken up from the rim. It describes the size of the shape. It is a convention, not a prediction.
What traders check
- The time frame. A curve across twenty one-minute candles is not what the textbooks describe.
- Whether the right side has actually reached the rim.
- Whether the curve is in the price or only in the line someone drew under it.
Where people go wrong
- Seeing the bowl when only its left half exists. A fall that slows may simply resume.
- Drawing a smooth curve under a jagged chart and believing the curve.
- Expecting the right side to mirror the left exactly.
On a real chart
Textbook shapes are rare. A real chart is ambiguous: the peaks are uneven, the lines can be drawn two or three ways, and the same candles are a rounding bottom to one reader and something else to another. Most shapes are also recognised only once they are finished, which is after the move they are said to announce has begun.
The picture on this page is invented. It was drawn by hand to show the shape as plainly as possible, with every awkward detail left out. It is not market data and it records nothing that happened.
Questions people ask
- Is a rounding bottom the same as a cup and handle?
- The cup is a rounding bottom. A cup and handle adds a small pullback, the handle, before the price passes the rim, and is usually described as forming within a larger rise.
- How long does a rounding bottom take?
- There is no rule. Textbooks describe it as one of the slowest shapes, lasting weeks to months on daily charts.
- Does a rounding bottom predict a rise?
- No. It describes what a price did while the shape formed. Published studies of chart patterns disagree about whether they tell anything about the next move, and the tidy examples in textbooks were chosen afterwards, when the outcome was known. It is one observation to weigh with others.
The words on this page
An explanation for study. It is not advice, a recommendation or a forecast, and a pattern described here says nothing certain about what a price will do next.