Skip to main content
Track Rounded bottom
11 / 14
Search the archiveLibrary
Library

2011issue C0466-71

Early semi-cup construction from the left rim and base

A mechanical-pattern-rule can flag a semi-cup by locating the left rim and base of a rounded-bottom cup before the right side completes. The same coded state can drive a cup-formation-alert, a watch-list-screen, and a chart overlay that still waits for later confirmation of a full cup.

  • A semi-cup is the first half of a rounded-bottom cup, detected from the left rim and base rather than from a finished picture.
  • A cup-formation-alert marks the bar where every coded cup condition is true, and a show-history-toggle can redraw earlier qualifying formations.
  • A watch-list-screen can sort symbols that meet the semi-cup rules and open a linked chart with current price against the overlay.
  • The overlay remains an early identification step and still requires later confirmation of a full cup before the pattern is treated as complete.
Entries in this reading3 entries
Current trackRounded bottom14 readingsPattern recognition48 readingsMechanical trading system158 readings

The left rim and base come first

The source presents a coded algorithm that flags a possible rounded-bottom cup by detecting roughly the first half of the formation rather than waiting for a completed cup.

That first half is a semi-cup: the left rim and base of a rounded-bottom cup, detected before the right side completes.

The method is described as mechanical recognition of possible cup patterns in time-series data by locating the left side and base as a precursor to a full cup.

A mechanical-pattern-rule sets a yes-or-no state

A mechanical-pattern-rule is a coded procedure that turns price-structure conditions into a yes-or-no cup state rather than a visual judgment.

One implementation plots an alert and a marker on the bar where every coded cup condition is met. That cup-formation-alert fires only when every coded cup condition is true on the current bar.

An input can also display historical formations. That show-history-toggle redraws prior qualifying formations instead of only the latest alert.

A watch-list-screen ranks current matches

A watch-list formula can label each symbol as meeting or not meeting the semi-cup criteria so a custom list can be sorted to the current matches.

That watch-list-screen flags which names currently meet the semi-cup rules so they can be inspected on a linked chart.

Linking that watch list to a chart lets a selected symbol show current price against a drawn semi-cup overlay.

Sample charts show failures and nesting

A sample daily chart is used to illustrate a large cup-and-handle that appears after earlier semi-cup failures, with the inset daily view showing two nested semi-cups inside the larger cup.

A nested-semi-cup is a smaller semi-cup that forms inside a larger unfinished or completed cup structure.

A weekly sample chart marks detected semi-cup formations with a parameter of 1.5 on a selected date of 07/24/2009.

A spreadsheet copy cannot scan history

A spreadsheet translation of the published basic code is presented as a static worksheet because it has no scan against an accessible price-history database.

Watch-list last prices for semi-cup and no-cup names

Sixteen information-technology symbols print a live semi-cup state and five print no cup. Last prices are taken from the watch-list Last column, so a trader can see the mechanical yes-or-no flag next to the price each name was quoting when the screen ran.
Sixteen information-technology symbols print a live semi-cup state and five print no cup. Last prices are taken from the watch-list Last column, so a trader can see the mechanical yes-or-no flag next to the price each name was quoting when the screen ran.Information Technology watch list

The list is sorted on the isSemiCup column, so current matches sit above the no-cup names. Bid, ask, high and low were printed beside each row but are not plotted. The bottom row (SRAY) was clipped and is omitted.

Educational research material, not investment advice. Historical source context does not establish present-day performance.
11 of 14 in the Rounded bottom track
201138-45 pp.Next on Rounded bottomEarly rounded bottom recognition on a locked log-price gridA rounded bottom can be hypothesized from a half-cup: a decline, a quiet low, and an incomplete recovery, without a finished right rim.
All readings on this track · 14 readings
  1. 1990Constructing falsifiable reversal patterns from price structure
  2. 1995Cup-with-handle construction: confirm the cup, the handle, then the breakout
  3. 1995Cup-completion cheat before the handle breakout
  4. 1998Constructing rounded-bottom cups as testable entries
  5. 1999Rounded bottom landmarks, invalidation, and breakout rules
  6. 2003Constructing rounded bottoms, triangles, and pennants
  7. 2006A five-by-five grid that accepts or rejects a cup
  8. 2006NTRI and the 2005 bowl breakout case
  9. 2006Rounded-bottom screens, first-try breakouts, and Fibonacci retracements
  10. 2007Constructing rounded bottoms as multi-year bases
  11. 2011Early semi-cup construction from the left rim and base
  12. 2011Early rounded bottom recognition on a locked log-price grid
  13. 2013Rounded turns as slope-first trade hypotheses
  14. 2017Evaluating a rounded bottom as a testable payoff structure
By fieldChart patterns222 readingsBy year201165 readings
All 14 readings tagged Rounded bottom
Also on Rounded bottom5 readings
1998Constructing rounded-bottom cups as testable entries1999Rounded bottom landmarks, invalidation, and breakout rules2006A five-by-five grid that accepts or rejects a cup2011Early rounded bottom recognition on a locked log-price grid1990Constructing falsifiable reversal patterns from price structure