> For the complete documentation index, see [llms.txt](https://docs.lsports.eu/u/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lsports.eu/u/trade/concepts.md).

# Concepts

This section covers the fundamental concepts you need to understand when working with TRADE data.

***

## Fixtures & Events

| Page                                                                              | Description                                      |
| --------------------------------------------------------------------------------- | ------------------------------------------------ |
| [Fixture Lifecycle](/u/trade/concepts/fixture-lifecycle.md)                       | Fixture states, transitions, and status handling |
| [Fixture Types](/u/trade/concepts/fixture-types.md)                               | Standard fixtures, outrights, and racing events  |
| [Fixture Ordering](/u/trade/concepts/fixture-ordering.md)                         | How to order and subscribe to fixtures           |
| [Participants, Teams & Players](/u/trade/concepts/participant-team-and-player.md) | Entity types and relationships                   |

***

## Markets & Odds

| Page                                                                         | Description                                            |
| ---------------------------------------------------------------------------- | ------------------------------------------------------ |
| [Market Types](/u/trade/concepts/market-types.md)                            | 1X2, Under/Over, Asian Handicap, and more              |
| [Mainline, Baseline & Line](/u/trade/concepts/mainline-baseline-and-line.md) | Understanding lines and handicaps                      |
| [Margin](/u/trade/concepts/margin.md)                                        | Margin calculations and configuration                  |
| [Probability](/u/trade/concepts/probability.md)                              | Probability fields and calculations                    |
| [Odds Suspension Logic](/u/trade/concepts/odds-suspension-logic.md)          | When and why odds get suspended                        |
| [Odds Settings](/u/trade/concepts/odds-settings.md)                          | Understanding odds settings and configuration concepts |

***

## Settlements

| Page                                                     | Description                         |
| -------------------------------------------------------- | ----------------------------------- |
| [Settlements](/u/trade/concepts/settlements.md)          | Settlement process and status codes |
| [Settlements Rulebook](/u/trade/settlements-rulebook.md) | Sport-specific settlement rules     |

***

## Advanced Features

| Page                                                  | Description                         |
| ----------------------------------------------------- | ----------------------------------- |
| [Safe Message](/u/trade/concepts/safe-message.md)     | Guaranteed message delivery feature |
| [Provider Odds+](/u/trade/concepts/provider-odds+.md) | Raw provider odds access            |
| [Configuration](/u/trade/user-guide/configuration.md) | Platform configuration options      |


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