> For the complete documentation index, see [llms.txt](https://1ex.gitbook.io/1ex-smart-dom/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://1ex.gitbook.io/1ex-smart-dom/features/order-book-dom.md).
# Order Book (DOM)
### Description
DOM (Depth of Market, Order Book) is a scale (or table) of limit orders for the purchase and sale of assets. Each order contains a price (quote) and volume in units of the financial instrument (security).
### Purpose
The Order Book (DOM) displays the total number of limit orders to buy and sell at each price above and below the market price. DOM makes it possible to reflect the real trade dynamics and take into account the smallest changes in market behaviour.
**Order Book creation**
1. In order to create the Order Book go to the left side menu and click Trading **→ Order Book**
2. In the window that opens, select Connection and Tool from the drop-down list or from the list of non-drop-down tools.
3. Click Apply. Once the Order Book is created, you will see the DOM workspace.
{% hint style="info" %}
You can also open the glass by clicking on the + on the top panel of the workspace.
{% endhint %}
:bulb:If you need to create an Order Book for a new financial instrument, repeat the steps described above.
:bulb:If the financial instruments were previously selected, the program will offer a display of the latest instruments (up to 5 pairs in the created Order Book window).
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