The journal is rules-based. Every rule in the SOP exists because the journal made the mistake that the rule prevents. This article explains why the journal chose rules over discretion, where discretion still has a role, and how the two are kept from undermining each other.

The case for rules

1. Rules are backtestable. A rule can be tested against the trade log. A discretionary decision can't be — there's no way to know what the discretion would have done in the past.

2. Rules are auditable. Anyone reading the trade log can check whether the rules were followed. Discretionary decisions require trusting the trader's judgment in the moment, which is exactly what the journal is trying not to depend on.

3. Rules compound. A rule that adds 0.5% of expected value per trade, applied to 250 trades a year, is a meaningful edge. Discretionary brilliance doesn't compound — it shows up when it shows up.

4. Rules survive bad months. The trader's judgment is worst when it's needed most: after losses, under stress, in unfamiliar regimes. Rules don't have moods.

The legitimate role of discretion

Discretion isn't banned; it's fenced. The journal allows discretion in three places:

1. Not trading. The SOP says when a trade qualifies; it doesn't require taking every qualifying trade. Passing on a setup because the tape feels wrong, the news flow is chaotic, or the trader is off that day is allowed — and logged as a pass with a reason.

2. Exiting early. The exit rules set the latest a position is held, not the earliest. Closing early for a documented reason (a regime shift, a broken thesis input) is allowed. The early exits are reviewed in the weekly pattern review to check whether the discretion is adding or subtracting value.

3. Proposing rule changes. Discretion's highest use is noticing that a rule is wrong and proposing a revision through the monthly process — with a pattern, a test, and a date — rather than overriding the rule in the moment.

What discretion may never do

The test

Every discretionary decision is reviewed against the same question: did it beat what the rule would have done? The journal keeps a running tally. If discretion consistently beats the rules, the rules get revised to capture what the discretion is seeing. If it doesn't, the discretion gets fenced tighter.

The goal was never to eliminate judgment. The goal is to make judgment accountable — to turn "I felt like it" into a testable claim with a track record.

About this article

Editor: Dependability Research Desk. The desk has tracked options, index-derivative structure, and daily U.S. equity markets since 2017, with a working book in SPX/XSP index options and a public trade log that records every entry, adjustment, and close.

Editorial process: Each forecast distils overnight data and primary sources (Cboe option chains, Federal Reserve releases, Treasury auctions, FRED historicals) into the worked-example frame: what the tape is saying, the mechanism behind the move, what to do this week. Forecasts are reviewed against the live close on the next publication; the track record is self-auditing on the forecasts page.

Corrections policy: When an article gets a fact wrong (wrong strike, wrong P&L, wrong expected-move calculation), we correct it inline and append a dated correction note at the top of the affected page.

Disclosure

The desk may hold the positions, options, or underlyings mentioned in a trade-log entry at the time of publication; positions are disclosed in the trade-log entry itself. Nothing on this site is investment advice.

Disclaimer. This content is published for informational and educational purposes only. Nothing here is investment advice. Trading options involves substantial risk of loss and is not appropriate for every investor. Past performance, including the journal entries on this site, does not guarantee future results. You are solely responsible for your trading decisions.