Who this entry is for — Readers studying ranges, accumulation or distribution who want to recognise the definition that preceded the formalisations of Wyckoff and modern textbooks.
In William Peter Hamilton's formulation, a line is a succession of closing prices contained for a significant period within a relatively narrow range. The line represents a temporary balance between buying and selling and may precede a secondary or primary movement.
Its nature cannot be known with certainty in advance: the resolution will indicate whether the range functioned as accumulation or distribution.
Historical definition
In plain language — As long as price remains in the range, buyers and sellers balance each other. The exit shows which side prevailed, but gains weight when the other average confirms it.
Hamilton describes a line through four elements:
| Element | Meaning |
|---|---|
| narrow range | closing prices fluctuate within recognisable limits |
| duration | the behaviour persists long enough not to be a chance pause |
| sufficient activity | a genuine transfer of securities occurs within the range |
| resolution | one or both averages leave their respective limits |
He gives neither a universal percentage for the width nor a fixed number of sessions. In the historical 1914 case he examines lines lasting more than sixty sessions, but the example does not become a mandatory threshold.
Accumulation or distribution
Before the breakout, Hamilton considers the line compatible with either outcome:
- accumulation: supply is absorbed and the range resolves upwards;
- distribution: available demand absorbs selling only temporarily and the range resolves downwards.
The subsequent direction retrospectively assigns a character to the line. This prevents every consolidation near a low from being called “accumulation” or every pause near a high from being called “distribution”.
Breakout and confirmation
A breakout by only one average does not complete the reading. Hamilton requires corroboration from the other average, while allowing it to arrive on a different day or in a different week.
| Event | State of the reading |
|---|---|
| both remain within the line | unresolved balance |
| one average leaves while the other remains inside | provisional indication |
| both leave in the same direction | confirmed breakout |
| one returns inside and the other does not confirm | initial indication weakened or negated |
The breakout alone establishes neither a price objective nor the duration of the movement. It indicates a change in the balance observed by the averages.
Volume: relative activity, not an absolute threshold
Hamilton writes of a “fair volume of trading” within the range, but warns that volume is relative: three hundred thousand shares may be significant in one context and negligible in another. Quantity alone does not define the line, and there is no historical threshold transferable to every market.
This qualification separates the source from modern automated breakout readings based on multiples of average volume.
Relationship to Wyckoff and the modern range
The Dow line is a conceptual antecedent of the range and of accumulation/distribution readings. The Wyckoff Tradition would develop a much more elaborate grammar of events, phases, tests, and cause and effect.
The two notions are not interchangeable:
- Hamilton's line is defined primarily on the averages;
- Wyckoff analyses an individual market or stock through price, volume and trading-range structure;
- phases A–E and events such as a spring or upthrust do not belong to Dow's original formulation.
Likewise, a modern breakout on a minute chart may be studied as an exit from a range, but that does not make it a “line” in the historical sense.
Common error — Assigning the cause before the resolution. A sideways range describes an observed balance; “strong hands are accumulating” is a hypothesis that requires additional evidence.
Sources
- William Peter Hamilton, The Stock Market Barometer, 1922, ch. I, pp. 6–7, and ch. XV “A Line and an Example—1914”, pp. 172–179, Internet Archive.
- S. A. Nelson, The A B C of Stock Speculation, 1903, ch. IX “Methods of Reading the Market”, pp. 42–45, Internet Archive.