Lumiere Learn

Make the risk decision before the order decision.

A source-backed library for active traders who want a repeatable pre-trade review: define the setup, decide what invalidates it, size from a dollar-risk budget, and practice the workflow in IBKR Paper TWS.

The short version

A pre-trade review should produce a falsifiable plan, not a prediction.

Before an order ticket, write down the market context, the setup, the evidence that would prove the idea wrong, the maximum planned dollar loss, the order behavior you expect, and the conditions that mean no trade. If one of those fields is missing, the review is incomplete.

Choose by decision

Start with the question blocking the review.

You do not need to read the library in publication order. Choose the decision that is still vague, then return to the full checklist before treating the review as complete.

DecisionStart hereComplete when
Build the whole reviewTen-step checklist or the private browser worksheetEvery required field is observable and a failed gate can still produce no trade.
Separate evidence from interpretationFive-layer evidence standardSource facts, calculations, system interpretations, user risk rules, and the decision record remain inspectably distinct.
Define what makes the idea wrongInvalidation versus stop-loss executionThesis failure is separate from the risk budget, alert, stop trigger, and eventual fill.
Calculate a size ceilingDollar-risk sizingThe whole-share result is reduced by any lower capital, liquidity, portfolio, data, or broker constraint.
Practice with IBKR Paper TWSConnection setup and the pre-order workflowThe written review comes before broker previews, and a connection does not imply order authority.
Decide what a tool can be trusted to doTool-role comparison and AI-tool due diligenceDiscovery, analysis, decision, execution, permissions, evidence, and limitations are named separately.

One synthetic path through the library

A finished calculation can still stop at no trade.

Assume a hypothetical long-share review—not a current security or quote—with a 50.00 USD entry condition, 49.20 USD thesis invalidation, 80.00 USD dollar-risk budget, and 4,000.00 USD capital ceiling.

Risk per share50.00 − 49.20 = 0.80
Risk-budget ceiling80.00 ÷ 0.80 = 100 shares
Capital ceilingfloor(4,000.00 ÷ 50.00) = 80 shares
Lower ceiling80 shares; 64.00 planned price risk
Failed freshness gateNo trade

The sequence matters: use the invalidation guide before the sizing formula, apply the lower constraints in the full checklist, and preserve the result in the decision record. If the source becomes stale, the arithmetic does not rescue the review. No trade is the complete output.

This is illustrative stock arithmetic, not a recommendation, suitability decision, current market observation, performance record, order instruction, fill assumption, or maximum-loss guarantee.

Editorial standard

What these guides will—and will not—claim.

Guides name primary sources, show the date reviewed, distinguish market structure from execution mechanics, and state material limitations. Examples are illustrative, not recommendations. For current execution and risk context, the library cites regulator and broker documentation such as Investor.gov on stop and stop-limit orders, FINRA Rule 2270, and IBKR's pre-order margin guide, reviewed August 4, 2026. Lumiere is not affiliated with or endorsed by Interactive Brokers.

We do not publish profit promises, “winning setup” claims, invented benchmarks, or performance statistics without a defined methodology and auditable sample.

See the workflow

Turn the checklist into a guided sample review.