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

# Place Orders

> Buying and selling shares on CHOK.

On CHOK, users trade with **market orders**: the order fills right away against the best available prices.

> [!NOTE]
>
> Limit orders (orders that wait on the book at your price) are not available to users right now.

## Buy

1. Open a market and choose an outcome, for example **Yes**.
2. Enter the **amount** of chUSD to spend.
3. Check the estimated shares and average price, then confirm.

The order fills against the best asks first, then the next best, until your amount is used.

**Minimum:** a buy must be worth at least **1 chUSD**.

## Sell

1. Open a market where you hold shares and choose **Sell**.
2. Enter the number of **shares** to sell.
3. Confirm.

Sells have no minimum.

## Slippage protection

A market order includes a worst acceptable price. By default, it allows **1.5%** past the worst price in your quote. If the book moves past it before your order arrives, the part that can't fill at that price isn't filled.

If that worst acceptable price is **0.10 or more** away from the current best price, the app warns you before you confirm.

## Fill rules

You can choose how a market order handles a partial fill in **Settings → Market order type**:

| Type | What it does |
| - | - |
| **Fill and Kill (FAK)** (default) | Fills as much as possible right away and cancels the rest |
| **Fill or Kill (FOK)** | Fills the entire order right away, or cancels it completely |

## Prices and ticks

* Prices are between the tick size and 1 − tick size, for example 0.01 to 0.99.
* See [Prices & Orderbook](https://docs.chok.market/concepts/prices-orderbook.md) for tick sizes.

## When you can't trade

An order is rejected if:

* You haven't verified your phone
* The market is closed, paused or resolved
* Trading is paused for the whole platform, for example between seasons
* Your chUSD balance (to buy) or share balance (to sell) is too low

See [Error Messages](https://docs.chok.market/resources/error-messages.md) for the exact messages.


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