ANALYZING CHART
PATTERNS: ROUND BOTTOMS
A rounding bottom,
also referred to as a saucer bottom, is a long-term reversal pattern that
signals a shift from a downtrend to an uptrend. This pattern is traditionally
thought to last anywhere from several months to several years. Due to the
long-term look of these patterns and their components, the signal and construct
of these patterns are more difficult to identify than other reversal patterns.
A rounding-bottom
pattern looks similar to a cup and handle, but without the handle. The basic
formation of a rounding bottom comes from a downward price movement to a low,
followed by a rise from the low back to the start of the downward price
movement - forming what looks like a rounded bottom.
The pattern should be
preceded by a downtrend but will sometimes be preceded by a sideways price
movement that formed after a downward trend. The start of the rounding bottom
(its left side) is usually caused by a peak in the downward trend followed by a
long price descent to a new long-term low.
Rounding
bottom (saucer bottom) reversal
The time distance
from the initial peak to the long-term low is considered to be half the
distance of the rounding bottom. This helps to give chartists an idea to as to
how long the chart pattern will last or when the pattern is expected to be
complete, with a breakout to the upside. For example, if the first half of the
pattern is one year, then the signal will not be formed until around a year
later.
In terms of the chart
pattern's quality, the two stages of the rounding bottom should be similar in
length. If the price were to rise too quickly from the low to the prior peak,
the strength of the chart pattern would be diminished. This does not mean that
they must be equal, but the trend should illustrate a cup shape on the chart.
The way in which the
price moves from peak to low and from low to second peak may cause some
confusion as the long-term nature of the pattern can display several different
price movements. The price movement does not necessarily move in a straight
line but will often have many ups and downs. However, the general direction of
the price movement (either up or down) is important, depending on the stage of
the pattern.
Volume is one of the
most important confirming measures for this pattern where volume should be high
at the initial peak (or start of the pattern) and weaken as the price movement
heads toward the low. As the price moves away from the low to the price level
set by the initial peak, volume should be rising.
Breakouts in chart
patterns should be accompanied by a large increase in volume, which helps to
strengthen the signal formed by the breakout. Once the price moves above the
peak that was established at the start of the chart pattern, the downward trend
is considered to have reversed and a buy signal is formed.
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