A clearer decision, one step at a time
Connect the research.
Keep your reasoning.
Build a thesis, check an expiration payoff, and carry a chosen draft between your workspaces.
01 / Reasoning before action
What is your decision?
This form stays in this tab until you download a file or explicitly save an integration draft. Leaving the page discards unsaved work.
02 / Transparent calculations
See the expiration payoff.
One to twelve option legs with the same expiry. This does not model pre-expiration value, assignment, exercise, dividends, margin or actual fills.
| Side | Type | Strike ($) | Premium / share ($) | Contracts | Expiry | Action |
|---|
Compare expiration scenarios.
Compare two complete option plans at the same underlying prices. Each plan uses its own entered costs once. Comparisons use expiration values, not expected returns.
Compare an expected-move approximation.
Uses price × IV × √(calendar days / 365). It is an input-based approximation, not a forecast or a calibrated probability.
03 / Preview before sharing
Carry the reasoning forward.
Choose a downloaded decision JSON file. Reading and previewing it happens in this browser. Saving sends the previewed fields to your account on this site.
04 / Private integration drafts
Revisit a decision.
These are separate integration drafts. Saving here does not create a trade, consume an existing journal credit, or update your original workspace.