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

# Market Page

> Order placement, matching behavior, and trade visibility.

The Market page manages price discovery and order execution.

## Main Sections

* Place Order
* Order Book Filters
* Order Book
* My Orders
* Trades Filters
* Recent Trades

## Order Placement Rules

* Orders are always placed for your active company.
* Order region is your company's home region.
* Buy orders require sufficient **available cash**.
* Sell orders require sufficient **available inventory**.

Validation:

* Price must be positive.
* Quantity must be a positive integer.

## Reservation Behavior

* Buy order reserve: `price * quantity` is moved into reserved cash.
* Sell order reserve: quantity is moved into reserved inventory.

When an open order is canceled, remaining reserves are released.

## Matching Behavior

Matching runs per week by item and region.

* Buy priority: highest price first, then earlier time.
* Sell priority: lowest price first, then earlier time.
* A trade happens only when `best buy >= best sell`.
* Execution price uses the **resting (older) order's price**.

Settlement updates:

* Buyer cash decreases, reserved cash decreases.
* Seller cash increases.
* Inventory moves seller -> buyer in the same region.

## Refresh Behavior

* Market tables refresh after actions and when the week changes.
* Tick-based refresh is debounced (short delay) to avoid flicker.

## Player Tips

* A large gap between open buy/sell prices means fewer immediate fills.
* If "My Orders" stays open for many weeks, check your price vs current order-book priority.