Who this entry is for — "Buy, or sell short?" is every operation's first question, and the answer is not sought on the stock: it is sought on the Averages. Here is the book's complete worked example, dated 1 November 1968 — with all the numbers.
Source: J. M. Hurst, The Profit Magic of Stock Transaction Timing, Prentice-Hall, 1970 — Chapter 8, Determining the "State of the Market" (pp. 124–127, Fig. VIII-1).
Prerequisites
Hurst nominal cycles and Chapter 2's Dow measurements: here they are used as clocks.
The three clocks on 1 November 1968
In plain words — For each Dow cycle: when it made its last low, its recent average duration, hence where it stands on the dial — remembering that the top comes at half duration. Three hands, one verdict.
| Cycle | Last low | Position | Verdict |
|---|---|---|---|
| 4.5 years (recent average 52 months) | — | 24 months | Nearly halfway: push "slightly up to sideways"; low expected ~Q1 1971 |
| 18 months (71±4 weeks) | 817.61 — week ending 22 Mar 1968 | 32 weeks | Top expected at ~35–36 weeks: 3–4 weeks of upside left |
| 26 weeks (21.4±3.5) | 863.33 — point "J", week ending 9 Aug 1968 | 12 weeks | Already topped 1–2 weeks ago: rowing against |
The composite verdict, in substance verbatim: the residual push of the 4.5-year plus the 18-month will temporarily overweigh the 26-week — but only for 3–4 weeks; then the 18-month and 26-week will both be downside with the 4.5-year flattening. Hence: one last push, then "considerable downside activity" → "trade long for about a month — then switch to the short side as action signals develop" — cautiously, short trades, modest expected yields, "since we are in the vicinity of a market top-out".
The computational check
In plain words — Delicate moment (cycles in conflict) → a second opinion from the half-span. The 10-week average confirms the August low and delivers the target: Dow at 1001±14.
On the expanded plot around the 9 August low (Fig. VIII-1), the 10-week average — a close approximation of the 21.4-week cycle's half-span — confirms the low and gives the conjunction in the week ending 27 September 1968 at 932. From there, Chapter 6's ruler: the rise 863→932 (69 points) is half the total (138±14) → target 1001±14 (987–1015). At the 1 November close (948.4), at least 39 points remain to the top: the month-long window is confirmed, "and we can feel free to continue as planned".
Warning — This is the marriage of Chapter 5's doctrine (the Averages treated as a stock, the side compass) and Chapter 6's ruler (the half-span). And the historical validation sits in the experiment entry: the predicted sequence — dip to 930–950, rise to 960–1000, steep drop toward 890–930 — played out in full.
Summary card
| Step | Action |
|---|---|
| 1 | Clock each index cycle (last low + average duration → position) |
| 2 | Each cycle tops at half duration |
| 3 | Composite verdict: who pushes, who brakes, for how long |
| 4 | Half-span check with conjunction and target |
| 5 | Side decision: long/short, and with what caution |
Links
- Trading by logic — Chapter 8's framework
- Short selling — the Averages-as-compass doctrine (Ch. 5)
- Half-span and full-span — the check's ruler
- Hurst tradition — chapter index