# Matchstick Replay

> Matchstick Replay is a browser demo for deterministic replay of structured market events.

The deployed experience loads a synthetic BTC/USD day-trader order-book session (made-up data, generated for demonstration) by default, with an OpenCandle view also available. It can be explored without an account. The Time Travel Engine (TTE) name is an internal codename.

## Product surfaces

- [Replay demo](https://replay.matchstick.trading/): Scrub and replay the built-in session.
- [Synthetic day trader session](https://replay.matchstick.trading/): Preloaded synthetic BTC/USD session, selectable from the session menu.
- [Product overview](https://matchstick.trading/): Learn what Replay does and submit contextual feedback.
- [OpenCandle V1](https://matchstick.trading/opencandle/): Read about the open candle interchange boundary.

## Supported data boundaries

- Level 2 order-book sessions use ordered diffs, periodic snapshots, fixed-point decimal strings, and versioned runtime-validated files.
- OpenCandle V1 normalizes six-field tuples, descriptive objects, `~bar` shorthand objects, and protobuf-shaped objects into canonical records.
- OpenCandle feeds support versioned `object-v1` and compact `tuple-v1` encodings for APIs, tools, and LLM-oriented exchange.
- Determinism means the same retained, ordered events and timestamp reconstruct the same canonical state.

## Current limits

- The public demo is not an execution simulator and provides no investment advice.
- The default session is synthetic (generated, not a real market). It should not be represented as a live or recorded exchange feed.
- Pro controls are an access-preview and waitlist surface. No paid subscription checkout is currently offered in the demo.
- This file is an agent navigation aid. Access and training policy remain governed by robots.txt and the domain's HTTP policy.