Dow died before he could write his principles down.Hamilton tested them for 27 years, and Rhea, from a sickbed, shaped them into a theory — like Elliott, from the desk of a sickbed.
The English journalist William Peter Hamilton joined the WSJ in 1899 and worked under Dow for three years. In 1908 he became editor-in-chief and tested his teacher's principles live, in his editorial column, for 21 years.
«The Stock Market Barometer» — the first book to bring Dow's theory to the world. Its core idea: the averages forecast the future economy like a barometer, because the money of every informed person is already positioned there.
October 25, 1929 — the day after Black Thursday — Hamilton wrote his famous «A Turn in the Tide» editorial: both averages broke their support together, so the bull market was officially over. The next week brought Black Monday and Black Tuesday.He died 45 days later — having made the greatest call of his life.
Robert Rhea, bedridden by an aviation accident, analyzed Hamilton's 252 editorials and compiled the theory in his book «The Dow Theory» (1932). That same year, in his letters, he read the great 1932 bottom — DJIA 41.22 — almost to the day, and warned to exit before the 1937 top. He died in 1939.
① The primary trend cannot be manipulated — the daily swing can be, the tide never.② The averages discount everything. ③ The theory is not infallible — only the humble user wins with it. Rhea begins his book from these three «truths».
When both averages are pinned in a narrow ~5% range together for weeks — a «line»: the only reliable sign that accumulation or distribution is underway. If both break upward, buy; downward, sell. In Rhea's words, a break of the line is —the theory's highest-probability signal.
In September both averages topped — but the rallies that followed came with lower peaks, volume drying on rallies and reviving on declines. On October 23 both broke their summer lows together — for Hamilton this was simply a «confirmed reversal»: not a prophecy, the execution of a rule.
The moment both averages broke their summer lows together on Oct 23, the next day in his column: «The tide has turned — the bull market is over». The next week: Black Monday (−13%), Black Tuesday (−12%).The theory announced the crash to the day — a historical fact.
At the depth of the −89% collapse, Rhea wrote in his letters: a decline on dried-up volume, agreement between the two averages —«the sellers are exhausted, a new bull market is near». The DJIA bottomed that very day at 41.22 for the century, and rose +54% in 1933 — one of the greatest bottom-reads in history.
Both averages stall in a narrow range for six weeks. Then both break their upper edge on the same day. The read?
Mid-decline, Industrials rally weakly and defend their new low. Transports make a new low. What does Hamilton write?
1932: the index is down −89%. The latest declines come on shrinking volume, and both averages begin making higher lows. Rhea's read?
Industrials and Transports each give a verdict. Act only when both break the same way — one witness alone can lie. Enter, or hold off.
Dow observed → Hamilton tested → Rhea formalized →Elliott, Gann and Wyckoff built on that foundation. Technical analysis is not one person's discovery — it's a chain of observation passed down the generations.