> For the complete documentation index, see [llms.txt](https://docs.bitu.io/bitu/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bitu.io/bitu/project-design/omni-trading-hub/margin.md).

# Margin

Currently, users’ trading accounts support only $BITU as the asset, which is linked to a unified margin and risk monitoring system.

* The account margin is denominated in $BITU.
* The margin currency’s equity (the value of the held currency) is converted into margin value based on a discount rate.
* M**argin Currency and Discount Rate**: BitU sets the discount rate for each currency. The discount rate determines the effective value of the currency when converted into margin.

## Valid Margin

Valid Margin = Total Margin Value - Margin Loss

* It measures the level of risk the account can bear. A higher Valid Margin allows for more positions and liabilities to be supported.
* Total Margin Value is the weighted sum of the equity and the discount rate of each currency.
* Margin Loss: This includes estimated fees and potential price slippage from pending orders and positions.

## Available Margin

Available Margin = Valid Margin - Frozen Margin

* It is used to validate the ability to open contracts and borrow. When Available Margin is 0, there is no margin support for opening positions or borrowing.
* Frozen Margin: Includes liabilities, occupied margin for positions, and reserved margin for orders.

## Maintenance Margin Ratio (UNIMMR)

UNIMMR = Valid Margin / Maintenance Margin

* It is used to monitor account risk.
* The higher the ratio, the safer the account. If the value drops below 100%, it triggers the liquidation process.
* Maintenance Margin (MM) includes liabilities and contract maintenance margin, determined by the maintenance margin rate of the risk tier.