> ## Documentation Index
> Fetch the complete documentation index at: https://docs.capital.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Buy and sell contracts

Click any contract on [Markets](https://docs.capital.ai/app/markets.md) or Home to open its page.

![The H100SXM-11-26 contract page](https://mintcdn.com/capital-ai/2r_nz6EQ_1nQxtlD/images/trade.jpg?fit=max\&auto=format\&n=2r_nz6EQ_1nQxtlD\&q=85\&s=c2a4fbe3b005e48090b2afd8affeb6e5)

## Reading the page

* **The headline** is the last price per contract, the same price per GPU-hour, and the change over 24 hours.
* **The chart** plots the price. Switch **Contract** / **GPU-hour** to change the unit, pick a range from **1H** to **ALL**, and toggle between line and candles. The **Depth** tab draws the order book instead.
* **Order Book** lists resting asks (red, above) and bids (green, below), with the **Last** trade and the **Spread** between them. Switch the size column between **USD** and **GPU**; the **−1+** control groups price levels. The bar at the bottom is the buy/sell balance of the book.
* **Trades** is the tape: every fill on this contract, newest first.
* **Market Details**, below the chart, has the contract's month, hours and volume.

## Place an order

In **Place Order** on the right:

1. Pick **Buy** or **Sell**.
2. Pick the order type from the dropdown:
   * **Market** fills now at the best available prices, up to **Max Slippage** (5%) from the last price. Nothing rests.
   * **Limit** rests on the book at your price, a whole number of dollars per contract, until it fills or you cancel it.
3. Enter the **Size** in GPUs (whole contracts). **Max** fills in the most your **Balance** buys, or everything you hold free when selling.
4. For a limit order, enter the **Price**.
5. Check **Total**. Then click **Buy** or **Sell**.

The order goes to the exchange and the result shows at once. A limit order that doesn't fill appears on Home under **Orders**, with a **Cancel** button.

> [!NOTE]
>
> You can only sell what's free: contracts in another resting sell, or locked by a [deployment](https://docs.capital.ai/app/compute.md), don't count. The panel tells you how many are free.

## Fees

There are no trading fees today. A fill settles at its price.

From code: [Orders](https://docs.capital.ai/compute/orders.md).


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.