# FirmTape docs

> One guide a product: what it measures, where to find it, how to read it in thirty seconds, and every feature written up step by step.

Source: https://firmtape.com/docs

**It does not tell you direction.** **It tells you where the book stands and how far price may travel.**

Direction was tested three independent ways on this data and is not there: momentum on negative gamma does not replicate over 2022 to 2026, the sign of net gamma carries nothing across horizons, and a **random** entry time beats the crossing of a gamma threshold. So there are no arrows on this screen and no trade calls in any message: there is nothing honest to put in them.

What holds up is size. The expected move is calibrated: over 1,088 sessions the close landed inside one expected move 72.4% of the time. Read the numbers for position size, stop width and whether the day's geometry suits your own model, never for which way to face.

Every number is a measurement from a named book: the **volume** book (the conventional public object, built here from the tape), the **open-interest** book, or the **measured** book, signed print by print from the tape and its quotes. The guides say which book each reading comes from.

## The guides

- [REPLAY guide](https://firmtape.com/docs/replay): Every finished session, minute by minute, plus today's levels delayed and the free tools, no account (19 features)
- [LIVE guide](https://firmtape.com/docs/live): The SPX dealer book every second, with alerts, ASK, the structure tester and the levels in your own platform (54 features)
- [ORDERS guide](https://firmtape.com/docs/orders): The orders that built the SPX book, a card for every contract, and your own shorts checked every minute (20 features)
- [LAB guide](https://firmtape.com/docs/lab): Test an idea on the full archive, then watch it draw and alert on the live chart (9 features)
- [DATASET guide](https://firmtape.com/docs/dataset): Every finished SPX session as files, all three gamma books, updated every evening (6 features)
- [GEO guide](https://firmtape.com/docs/geo): What the world published, from public records, as context for the session (8 features)
- [Every guide on one page](https://firmtape.com/guide)

## Reference

- [Developers](https://firmtape.com/docs/developers): Every API, webhook and MCP tool: keys, errors, limits, signing, one OpenAPI document
- [Levels API](https://firmtape.com/docs/developers/live): The levels as JSON for plugins and scripts, with an OpenAPI document
- [MCP server](https://firmtape.com/docs/developers/mcp): Point an AI assistant at the archive, and with a Lab token at LAB
- [Orders API](https://firmtape.com/docs/developers/orders): The order ledger over REST and MCP, keys and limits
- [LAB API](https://firmtape.com/docs/developers/lab): Compile, backtest and optimize from a script
- [LAB vocabulary](https://firmtape.com/lab/vocabulary): Every column a LAB rule can name, with unit, range and book
- [DATASET](https://firmtape.com/dataset): The session archive as files: what they are and how they arrive
- [Data dictionary](https://firmtape.com/dataset/dictionary): Every field of the session files, by book
- [Learn](https://firmtape.com/learn): The concepts behind the readings, one page each

## For AI agents

Every docs and features page has a Markdown copy: add `.md` to its address. The list: [/docs/llms.txt](https://firmtape.com/docs/llms.txt).