Positions in one tab, fills in another, a spreadsheet you stopped updating in March. Trader pulls it into one living ledger — what you hold, what it's worth right now, and what needs you before the close. You trade. It keeps the truth.
Everything below runs on your own private book — nobody else's data, nobody else looking at yours.
Screenshot your brokerage positions, paste them in, and the book builds itself — legs, strikes, cost basis, the lot. No CSV ceremony, no evening of data entry.
One page with what moved, what's expiring, what's scheduled, and what's flagged — the answers you currently open five tabs to assemble.
Every expiring position ranked by what it's still worth, with assignment-risk flags raised while they're still cheap to act on — not after.
Rolls, adjustments, and exits stitch into campaign P&L, so "is my covered-call program actually working?" gets a number instead of a feeling.
A spot × volatility grid over your actual positions. Find the square that hurts — market down 5%, vol up 25% — while it's still hypothetical.
The thesis you had at entry, kept next to how it resolved — and any past day's book, replayable exactly as it looked. Your trading memory, outsourced.
Most trackers price your book with textbook Black-Scholes and hope. Trader's engine was built for a real-money book, and it shows:
Options are valued on a binomial tree with early exercise, not European Black-Scholes with fingers crossed. Deep-ITM puts and dividend-week calls mark honestly, and greeks come off the same tree — no model mismatch between price and risk.
A position that crosses an earnings date carries an event-aware risk number that models IV collapsing after the print. That's the risk you're actually taking — a flat-vol model simply can't see it.
The scenario lab and the exposure page reprice every option under joint spot-and-vol shocks. Multiplying delta by beta isn't stress testing; running the whole book through the model at −5% / vol +25% is.
Every earnings name shows the move the options are pricing next to what the name's own history says it deserves, with market-implied probabilities where a number helps. You see when the market is paying up — and when it isn't.
Early-exercise warnings fire when exercise actually becomes rational — remaining extrinsic, dividend capture, carry — not on a crude days-to-expiry timer that cries wolf all month.
The rules that evaluate candidates are frozen, versioned artifacts, and a battery of golden tests pins the app's math to the research that vetted it — to four decimal places. The math you tested is the math that runs.
The part that makes it trustworthy is the part that's unusual:
No signals, no picks, no nudges. It reports facts and written-down rules — which is exactly why you can believe it when it flags something.
Marks, P&L, and risk all come from one audited ledger. When a figure looks odd you can follow it to its source instead of shrugging at a black box.
Invite-only, one private database per account, no feeds of your data anywhere. Delete it all whenever you like.
Sign up with an invite code, poke at the demo book, then paste in a few of your own (or made-up) positions and watch the pages light up. In-app help answers questions as you go.