Measured range, scale-in ladders, and spread replay as a cash-reserve design

This archive article treats the scale-in ladder as a cash-reserve problem rather than an entry flourish. Measured range decides whether a planned book can be funded at all. A lot multiplier converts that range into bounded exposure. Historical replay exists only to reject an increment that turns a two-sided scale-in into an accidental directional hold.

Editorial note: the framing of the ladder as a cash-reserve design is a TradersWeek reading of the archive workflow. It is not attributed to the historical source.

A completed cycle is built from paired limit orders placed above and below the last fill. After one side fills, the unused order is canceled and a new pair is posted. The process repeats until the cycle ends. That cancel-and-replace-cycle is the mechanical spine of the book.

Share count is not a single all-in ticket. It is a shares-per-series multiplier applied to a numbered adding-series so each fill is only a portion of the planned book. The archive illustrates the adding-series as 1-2-3-4-5-6. The lot multiplier can be raised as cash accumulates. An example 1-2-3-4-5-6 series at 100 shares per step on a 10-dollar name starts the first fill at 700 shares, or 7000 dollars of exposure.

Range is computed as high minus low divided by close. A 10 high, 9.5 low, and 10 close yields a 5 percent daily reading. A 10 high, 9 low, and 10 close yields a 10 percent weekly reading. Those readings are then averaged over many periods.

A 10 percent weekly average is used as an elevated-range-mark. Readings under that mark are treated as ordinary noise that may stay stable for years. Readings over it are treated as possibly short-lived, lasting months, and requiring closer watch or an exit.

In one weekly sample taken when the industrial average fell about 85 points and exchange volume averaged about 195 million shares, more than one-third of the sampled names printed weekly range above 10 percent. Lower-priced names showed more range than higher-priced names. When exchange volume later fell 40 percent to about 120 million shares, measured range fell by a comparable amount.

The point-spread is the discrete price increment that places the paired buy and sell limits around the last transaction. Candidate point-spreads are replayed on historical prices starting at 0.125 and stepping upward. The resulting cycle summaries form an irregular distribution. Cheaper names often favor an increment near 0.375. Dearer names often favor an increment of 1 or more when range is stable.

Spread-replay is that stepped historical simulation. It is used to inspect cycle cash, fill frequency, and whether appreciation overruns the cash reserved for later adds.

Two January-to-mid-March 1989 replays used the same adding-series and the 0.125, 0.250, and 0.375 increments. One name averaged 13.8 percent weekly and 5.3 percent daily range. The other averaged 18.9 percent weekly and 9.4 percent daily range. The more volatile replay showed a 0.375 increment letting price advance absorb cash that later adds needed.

The historical selection rule favored sideways paths over rising or cycling paths because a level field produced cash that could be recycled into a larger lot multiplier.

Taken together, the archive workflow gates the book with range-volatility against the elevated-range-mark, sizes fills with shares-per-series on a fixed adding-series, runs a cancel-and-replace-cycle at a chosen point-spread, and uses spread-replay only to keep later adds fundable. The design question is whether the ladder can be paid for from cycle cash without turning the two-sided structure into a one-way hold.