2007issue C061-3
Constructing rounded bottoms as multi-year bases
A rounded bottom or flat saucer is a construction problem on weekly and monthly chart scale. Public liquidation and patient accumulation of the remaining float cancel into a narrow oscillating range. Editorial practice is to treat only those range edges as support and resistance while the decline is still turning sideways.
- Weekly and monthly chart scale is required to see a rounded bottom or a flat bonanza bottom. Shorter bars hide the construction.
- Base building is the long transfer of remaining float from late public holders to patient buyers. The two pressures cancel into a narrow oscillating range.
- Use only the floor and ceiling of that range, including any distinct resistance shelf, as support and resistance while the down-to-sideways turn is still being built.
- Everyday shopping heuristics treat a low price as leftover or damaged goods, so buying after a decline can feel socially wrong even when the base has only begun.
Shopping heuristics and a falling price
Everyday shopping heuristics treat a low price as a sign of damaged or leftover goods. Buying after a decline therefore feels socially wrong even when a long base is only beginning to form.
That social hesitation is part of the construction problem. The rounded or flat saucer is still being built while the price looks leftover, so the first task is to change chart scale rather than to treat the low print as a finished signal.
Forces that create the swing
Large price swings are framed as the product of three forces: rash public reaction, executive option grants after crashes, and concentrated buyers accumulating the remaining float.
Once experienced holders, hidden accumulators, and executives have distributed, prices can fall to multi-year lows, after which new low-priced option grants are arranged ahead of a later multiyear advance.
After 1930s reporting reforms, concentrated float accumulation is described as going underground. It sometimes finishes in a few days or months of heavy volume, and it is sometimes stretched across years of depressed prices.
Weekly and monthly chart scale
The rounded or flat saucer bottom is defined as a gradual sequence from decline to sideways to advance. It is specified as visible only on weekly and monthly charts.
A rounded bottom is a slow curved reversal that moves from decline through a long sideways stretch and only later turns higher. A bonanza bottom is a flat saucer variant in which the turn is so gradual that it reads as a multi-year trading range rather than a sharp V.
Chart scale is the first construction choice. Weekly and monthly bars are required to see the rounded or flat base. Shorter bars hide the construction.
Base building into a narrow range
During that base, public holders who bought years earlier keep selling while experienced buyers absorb the float. The two pressures cancel into a narrow oscillating range.
Base building is that long sideways construction, often lasting years on weekly or monthly bars. It is created while remaining share supply, the publicly available float, is transferred from late public holders to patient buyers.
Support and resistance from the range
Support and resistance are the floor and ceiling of that narrow range, including any well-defined resistance shelf that later marks where incremental buying would stop.
Editorial reading: while the decline is still turning sideways, do not add extra levels. Use only the observed edges of the oscillating range, and treat a distinct resistance shelf as the ceiling of that same construction.
One weekly construction
One weekly construction is labeled a three-year base of 180 weeks with 11 higher and 9 lower readings across 1,253 calendar days. The full rounded bottom is described as lasting eight years, and the same chart marks a distinct resistance shelf.
That example is an archive description of how a long saucer was counted on weekly bars. It is not a template that every base must match.
Late participation
Inexperienced participation is described as late: hesitation while prices are depressed, entry after widely circulated success stories, and systematic error at tops and bottoms rather than in the middle of a trend.
That late timing is why the construction has to stay on weekly or monthly scale until the selling and the absorption cancel. The testable object is the narrow range those two pressures leave behind, not a short-bar reversal.
All readings on this track · 14 readings
- 1990Constructing falsifiable reversal patterns from price structure
- 1995Cup-with-handle construction: confirm the cup, the handle, then the breakout
- 1995Cup-completion cheat before the handle breakout
- 1998Constructing rounded-bottom cups as testable entries
- 1999Rounded bottom landmarks, invalidation, and breakout rules
- 2003Constructing rounded bottoms, triangles, and pennants
- 2006A five-by-five grid that accepts or rejects a cup
- 2006NTRI and the 2005 bowl breakout case
- 2006Rounded-bottom screens, first-try breakouts, and Fibonacci retracements
- 2007Constructing rounded bottoms as multi-year bases
- 2011Early semi-cup construction from the left rim and base
- 2011Early rounded bottom recognition on a locked log-price grid
- 2013Rounded turns as slope-first trade hypotheses
- 2017Evaluating a rounded bottom as a testable payoff structure