In order to prevent market manipulation, the contract platform limits the users’ opening and closing prices.

• As a example for BTC：

[searching price Limit of more trading pairs]

【The above data and indicator contents may be adjusted in real time according to market conditions, and the adjustments will be made without further notice.】

For example: The price limit of BTC perpetual swaps contract

For example, take the non-basis price limit range of BTC as ±4%, normal hard price limit range of ±6%, basis price limit range of ±4%；

Within 10 minutes after perpetual swaps contract is generated: (No basis price limit)：

Highest bid price = min [ spot index * ( 1 + 6% ) , spot index * ( 1 + 4% ) ]

Lowest ask price = max [ spot index * ( 1 - 6% ) , spot index * ( 1 - 4% ) ]

10 minutes after the perpetual swaps contract is generated: (Basis price limit):

Highest bid price = min [ ( Basis average of the past 10 minutes + spot index ) * ( 1 + 4% ) , spot index * ( 1 + 6% ) ]

Lowest ask price = max [ ( Basis average of the past 10 minutes + spot index ) * ( 1 - 4% ) , spot index * ( 1 - 6% ) ]

Rules above apply to both opening and closing positions. When opening long or closing short, if the buy order price is higher than the highest bid quotation, strict price limit will be triggered; When opening short or closing long, if the sell order price is lower than the lowest ask quotation, strict price limit will also be triggered.