Undisclosed rules block system robustness tests

What an undisclosed system withholds

Some commercial mechanical systems were sold with both the trading rules and the preferred parameter values withheld. The buyer paid first and then had to reconstruct the procedure afterward. That offering is an undisclosed system: a mechanical procedure sold without publishing the rules or the preferred parameter values that generate its signals.

Vendors were reported to sell such opaque systems successfully. Raising the price itself was treated as a demand tactic, including services that began in a 25 to 40 range.

An inspectable procedure can be priced modestly

Openly described idea packages priced under 1000, and sometimes under 100, were judged comparable to expensive disclosed packages and better than any hidden-rule package. An inspectable procedure is a complete, auditable set of entry, exit, and stay-out rules that can be run, revised, and version-checked as one method.

Result diagnosis needs published rules

If the rules stay hidden, a trader cannot tell whether a given gain or loss is a normal system outcome, an unforeseen market change, or a defective design. Result diagnosis is that classification, and it requires a known procedure.

Hidden logic also blocks version control. One currency system was reported to change signals with every update until updates stopped, so buyers could not confirm they still held the same procedure. That pattern is silent revision: a vendor update that can alter hidden signal logic so live behavior no longer matches the procedure the buyer thought was tested.

Why secrecy is not required

Without disclosure, buyers cannot separate crooked vendors from reputable ones. That gap was treated as sufficient reason to ignore undisclosed systems.

Full rule disclosure is urged because data capture, signal generation, and parameter-search software can cost more to rebuild than the purchase price, so secrecy is not required to protect the product. Parameter search is the adjustment of rule inputs against historical market state. The search is unverifiable if the rules themselves are secret.

The later conclusion is not to buy a system whose interior is withheld, unless the price is in the range usually paid for entertainment software.