Rounding bottom

What it is

A rounding bottom, also called a saucer, is a slow reversal at the end of a downtrend. The decline loses speed, flattens into a wide, curved low, and then turns up just as gradually. The level where the curve began is the rim. The pattern completes when price closes above it.

Why it forms

In a downtrend, sellers are in control. A rounding bottom shows that control fading over time rather than in one event. Each drop is smaller than the last, fewer traders are willing to sell at lower prices, and trading goes quiet at the bottom.

Then buyers return, first slowly and then with more conviction. Higher lows and rising volume on the right side of the bowl show demand building. A close above the rim means price has recovered the whole rounded decline, and traders who sold on the way down are now watching it move away from them.

How to identify it

• A downtrend before the pattern.
• A wide, U-shaped low. The curve matters: a sharp V is a different kind of reversal.
• Volume shaped like the bowl: heavier at the start, light at the bottom, rising on the way back up.
• Time. Rounding bottoms are slow. On a daily chart they often take weeks or months to form.

What confirms it

A candle close above the rim, ideally on rising volume. A pullback that holds above the old rim is further confirmation.

What invalidates it

• A new low below the bottom of the bowl. The downtrend has resumed.
• A breakout that closes back below the rim and keeps falling is an early warning that the turn has failed.

Common mistakes

• Calling the bottom early. From the middle of the bowl, a rounding bottom and a pause before another leg down can look identical.
• Confusing it with a cup and handle. A cup forms within an uptrend and has a handle. A rounding bottom follows a downtrend.
• Forcing the curve. A few choppy candles near a low are not a rounding bottom. The shape should be clear at a glance.
• Treating the measured move as a price target. It is a reference for scale, not a forecast.