# Contract variety elements

All USDT contract basic parameters are as follows:

| Contract code | Margin coin | Contract face value | Minimum price variation | Minimum maintenance margin rate |
| ------------- | ----------- | ------------------- | ----------------------- | ------------------------------- |
| BTCUSDT       | USDT        | 0.0001 BTC          | 0.1 USDT                | 0.40%                           |
| ETHUSDT       | USDT        | 0.01 ETH            | 0.1 USDT                | 0.40%                           |

The above data and indicators content may be adjusted in real time according to market conditions, the adjustment will not be notified.

* **Contract Code:** This is a unique identifier for the contract, typically a combination of the base currency and the quote currency (e.g., BTCUSDT for Bitcoin Tether contract).
* **Margin Coin:** This is the currency required to maintain a position in the contract. In this case, both contracts use USDT (Tether).
* **Contract Face Value:** This represents the underlying value of a single contract. For BTCUSDT, it's 0.0001 BTC, meaning one contract controls the price movement of 0.0001 Bitcoin. Similarly, for ETHUSDT, it's 0.1 ETH, meaning one contract controls the price movement of 0.1 Ethereum.
* **Minimum Price Variation:** This is the smallest amount the price of the contract can change in one tick. For both contracts, the minimum price variation is 0.1 USDT.
* **Minimum Maintenance Margin Rate:** This is the minimum percentage of the position value that needs to be maintained in your account to avoid liquidation. In this case, both contracts require a minimum maintenance margin rate of 0.40%. This means if the value of your position falls below 0.40% of its original value, the platform may force you to sell some of your holdings to meet the minimum margin requirement.


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