Rule Breach Postmortem Template for Prop Traders
Last verified: 2026-06-04 PDT
A rule breach postmortem is the review a trader writes after a rule is broken or nearly broken. The goal is not to create excuses. The goal is to make the next checklist clearer, the next guardrail stronger, and the next decision easier to inspect.
What a rule breach postmortem means
A postmortem is a timeline plus a process fix. It answers what rule applied, where the rule was documented, what the trader believed at the time, what actually happened, and what control changes before the next session.
Why this matters for prop traders
Prop traders often fail from operational mistakes, not just bad market reads. Daily loss limits, max contracts, payout windows, news restrictions, consistency expectations, and trailing drawdown rules can all create failure points. The trader needs a repeatable way to review those points without guessing.
The template
Use six blocks: rule source, event timeline, trigger, risk impact, decision point, and prevention step. The prevention step must be specific. “Be more disciplined” is not specific. “Add a pre-session max-size check and stop trading after two rule warnings” is specific.
Math example
Suppose a trader has a personal daily stop of $300 and a platform or firm loss limit above that. If the trader ignores the personal stop and continues until down $520, the breach is not only a $220 difference. It is evidence that the first control did not stop behavior when stress increased.
Common mistakes
The first mistake is writing the postmortem only when the account fails. The second is treating a rule breach as a character flaw instead of a system problem to inspect. The third is updating the plan without checking whether the new control is measurable.
Bucko workflow
Bucko fits this as an education, journaling, guardrail, scenario-analysis, and review workflow. Traders can store rule sources, document breach timelines, tag triggers, attach screenshots, and review whether new controls are actually used. Bucko is not a workaround for firm rules; it is a workspace for trader-defined review and accountability.