> For the complete documentation index, see [llms.txt](https://help.trade.fun/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.trade.fun/prediction-market/trading/order-book.md).

# Order Book

The Order Book shows all open buy and sell orders for a market outcome. It helps you see current liquidity, price levels, and how tight the spread is before you trade.

<figure><img src="https://2688198036-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhntkAx0dqGAXIejmltGN%2Fuploads%2F1xarCwqIZ6AI7HtR8bTM%2Fimage.png?alt=media&amp;token=38f87c84-39d3-47e3-b802-3ddad3bf5a72" alt=""><figcaption></figcaption></figure>

**How It Works**

* **Sell Side (Red)**\
  Shows all active sell orders.\
  The top red line is the *lowest ask* – the cheapest “**Yes**” shares available to buy.
* **Buy Side (Green)**\
  Shows all active buy orders.\
  The top green line is the *highest bid* – the most anyone is willing to pay right now.
* **Spread**\
  The gap between the top buy and sell prices.\
  A smaller spread means more liquidity and faster trade execution.

***

**Columns Explained**

* **Price** – The current order price for each level.
* **Amount** – Number of shares available at that price.
* **USD Total** – Total dollar value of all shares at that level.

***

**Market Info Above the Order Book**

* **Open Interest** – Total value of all active positions.
* **Volume** – Total traded since the market opened.
* **End Date** – The date trading closes and the market resolves.