Treat the mechanical signal as a draft, not a decision

A fired rule is still a draft

The archive treated a mechanical-trading-system as a fully specified entry, exit and abstention procedure, not as a shortcut that buys the signal. The mechanical long remained a base rule only. Editorial reading: treat that signal as a draft order until a same-session checklist-process either confirms it or requires abstention.

Losing clusters produced the written rule

After 22 losses in 25 trades, the operator spent about 100 hours reviewing two to three years of trades and listed repeatable errors: attempting to catch extremes, placing stops too near price, reacting to news commentary, and following the crowd.

In October 1990, after two consecutive losing months, an informal bounce-from-low observation was converted into a mechanical long: buy after a set time of day once price was 180 points above the session low.

Historical tests of that 180-point bounce rule showed it could inflict large damage in sideways or choppy sessions, which prompted a shift to a morning new-high pattern as the core mechanical setup.

Tape-confirmation can force abstention

Live entries also required same-session confirmation from other averages, the tick index and the intradary Arms index, and a conflicting tape produced abstention. That stack is a checklist-process: a pre-trade confirmation stack that can veto a mechanical signal when live market state disagrees.

Tape-confirmation means judging a signal against last price, session highs and lows, related averages and breadth gauges before any order.

On one documented morning the mechanical system signaled long while the industrial average was down 32 points and the tick index read -519. The operator refused the long, and price then broke lower after a wide gap open.

The documented short-side checklist required four concurrent conditions: new lows between about 9:20 and 9:45, price 180 to 200 points off the session high, a negative tick, and TRIN at 0.95 or higher.

Drawdown can veto the sequence

Two stated reasons for rejecting purchased mechanical systems were an inability to sit through the drawdowns every such system produces, and a requirement that any vendor supply multi-year real-money brokerage statements.

A trading-psychology-process is the operator constraints that decide whether a rule will still be executed after a losing cluster or during drawdown. A drawdown-veto is a personal halt on continuing a mechanical sequence once equity stress exceeds what the operator can execute calmly.

The operator argued that a person should not day-trade an index future from a mechanical rule alone without first learning the psychological, technical and fundamental behavior of the cash equity market.

Editorial reading: name the drawdown-veto before execution. Entry, exit and the choice not to trade belong in one testable process.