Self-relative volume boxes for news-free breakouts

A stock as its own control group

A name that has spent months in a narrow sideways band on moderate volume, then prints a session in which volume doubles and price leaves that congestion, is treated as a candidate move that still has to be checked for validity.

The comparison is to the same stock's own prior history rather than to other stocks, in order to detect a dramatic local shift in supply and demand. The traits used to surface such candidates are a leave of a trading range, a sharp volume increase, a large session range, and no news that accounts for the move.

Reading the session as a box

Each trading day can be drawn as a box with price on the vertical axis and volume as width, so the box's shape jointly shows that day's range and share turnover. In volume-price-analysis, each session is one mark whose height is the high-low span and whose width is that day's turnover, so unusual travel and unusual participation are judged together.

Tall thin boxes are read as easy travel, short fat boxes as difficult travel into resistance, and a powerful session as tall and also fairly wide rather than extremely thin. Self-relative-box-area is the product of a session's price span and its volume, compared with that same issue's preceding sessions rather than with other names.

A scan is only a starting sample

One computer scan keeps any name whose latest box area is at least twice as large as any of the prior 30 boxes, and that list is a starting sample rather than a trade signal. A box whose size and shape no longer match the stock's recent history is a change-of-character: it implies the prior balance of buying and selling has been disturbed, not that a trade has already been defined.

News absence, then chart rules

Public news and circulating rumors are reviewed in order to drop names that already have a widely known explanation. That news-absence-filter leaves only unexplained abnormalities for chart review. Remaining names are then accepted or rejected only by chart-reading rules.

Volume-confirmation requires a sharp rise in traded size with the range expansion before a leave of congestion is treated as evidence that the local supply-demand balance has changed. A breakout is a push through the boundary of a prior sideways band, treated as more credible when the break session is both taller and wider than the stock's own recent boxes.

Two illustrated names

In the first illustrated name, the flagged session was both taller and wider than the small boxes before it, pushed through the top of a long sideways band, showed no startling news, and coincided with an upward moving-average cross and a positive ease-of-movement reading.

In the second illustrated name, the flagged session combined very large volume and range with a wide gap that left the old sideways band to the downside after ease of movement had already been negative for some time.

When the whole tape is loud or quiet

When the whole market prints huge volume and range, many names can pass the area screen yet still be meaningless. In a quiet tape the threshold may need to be loosened. After a single wild day the lookback can be shortened so that day is excluded from the usual 30-session comparison.

Editorial reading

Editorial interpretation, not an archive claim: a stock is its own control group. A session whose volume-price box suddenly dwarfs that name's recent history is only a change-of-character alert. It becomes a breakout hypothesis only after the same bar clears a prior congestion band and still has no public news or widely circulated rumor attached to it.