Split-sample floors, ceilings, and standing aside

Wait for a historic extreme

The procedure waits for historic price extremes at which producers and consumers are forced to change future output and use. Each new extreme is treated as raising the chance of a later reversal.

Until such an extreme is reached, the coded choice is abstention: hold no position. Standing aside is part of the rule set, not an informal pause.

How cheapness and richness are expected to adjust

Very low prices are described as shrinking later supply when marginal producers shut down and as lifting demand when buyers switch to cheaper substitutes.

Very high prices are described as inviting more supply and less demand, including the chance that output in other regions can offset a local crop failure.

Mean-reversion, in this usage, is buying near a historic floor or selling near a historic ceiling on that supply-and-demand premise.

Floors, ceilings, and profit targets

A floor-price is a long-entry threshold read from a multi-decade monthly futures chart of a tangible commodity. A ceiling-price is the matching short-entry threshold from the same long-term monthly chart family. A profit-target is the predetermined exit at which a floor long is liquidated or a ceiling short is covered.

A long is opened at the floor and closed at its profit target. A short is opened at the ceiling and covered at its profit target.

Unused-half floors, targets, and ceilings

Two floor-and-ceiling sets were read from the first half and the second half of each series. Each half was traded with floors, profit targets, and ceilings taken from the unused half.

That transfer is walk-forward-analysis: select the levels on one half of a series, generate the buy, sell, and stand-aside signals only on the other half, then reverse the halves.

Long-lived holdings and actual contract prices

Because holdings were typically long-lived, actual contract prices were used so rollovers included real spread differences and carrying charges. Slippage and commission were included as a round-turn charge.

Where the combined rules were applied

The combined rules were applied to corn, wheat, soybeans, soybean oil, soybean meal, copper, pork bellies, hogs, cotton, and heating oil. Some series, including heating oil, begin later than the others.

The closing note frames the same rule set as an aid for a scale trader who adds to a position rather than taking a single full-size entry. Scale-in-position, in this usage, is adding to a commodity position in increments rather than taking the full size at the first floor or ceiling touch.

Editorial reading

Editorial: TradersWeek treats the archive workflow as three jointly testable decisions, not as separate hunches about bottoms and tops. Wait until a historic extreme. Add only on the scale-in path the rules allow. Accept a floor, target, or ceiling only after it has been transferred onto the unused half of the series.

Editorial: entry, exit, add-on, and abstention are read as one procedure so that a floor or ceiling taken from the unused half can be checked together with the choice to stand aside until price reaches that extreme.