> 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

<figure><img src="/files/Z6xHglhjQ7itYHR1GDdv" 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.


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