The index price is calculated by referring to the spot price of several mainstream exchanges in the market, including Binance, Okex, Huobi, Coinbase, Kraken.

It should be noted that the reference exchanges may be removed from the system due to unpredictable and abnormal factors.

The mark price is calculated based on the sum of the moving average of the index price and the basis, which is mainly used for account Profit and Loss and liquidation calculations. (Notice: the forced liquidation is calculated based on the mark price, not the latest transaction price)

TruBit Pro sets a trading protection range for the order price in contract trading based on the index price, and the system rejects orders whose order price locates outside of the price range. The upper limit of the price range is used to prevent overpriced buy orders, and the lower limit of the price range is used to prevent underpriced sell orders.

In addition, in order to protect the stability of the system, the platform regularly reviews users' high-frequency and very low-holding time trading orders. If the average holding time of an account's orders is less than 5 minutes, and the trading volume of opening and closed positions is more than 80% of the total trading volume, we will consider illegal high-frequency arbitrage activities for those trading behaviors. The platform will suspend the withdrawal and deposit functions of the related profit in the account.