2.1 Calculate the mark price of Futures and Perpetual Mark price = Index price + Basis of moving average Basis of moving average = Moving average of (Mid price of contract - Index price) = Moving average of [(Best ask of contract + Best bid of contract) / 2 - Index price] Note: USDT-margined, USDC-margined and crypto-margined contracts refer to the index price of base currency as their index price. E.g.

spot, which only includes spot buy and sell Cost price = (Average cost price before last buy × Amount + Price of last buy × Amount) / Net buying amount PnL = (Last price – Cost price) × Net buying amount PnL Ratio = (Last price – Cost price) / Cost price

price-based limit price rules: Phase Highest price limit Lowest price limit First minute after listing Deal price of Call Auciton period * (1+H) No price limit 1 ~ N minutes after listing Close price of last minute * (1+H) No price limit After N minutes after listing No price limit No price limit Spot trading Buy orders: Orders placed above the highest price limit will trigger the price limit rules.

What is a spot index price? Spot Index price aims to measure the price of an underlying cryptocurrency. OKX’s USDT-margined contracts are denominated in USDT index price, USDC-margined contracts are denominated in USDC index price, while coin-margined contracts use the USD-equivalent spot index price of the underlying cryptocurrency.

Regards, OKX Feb 20, 2019

Following a sharp rise in its price beginning in early November 2024, the token experienced an initial sudden and substantial price decline of more than 80% across the market at approximately 2:28:32am (UTC+8) on April 14, 2025 ("Market Event"). We observed that substantial trading volume spikes and price decline initially happened across various centralised exchanges outside of OKX, before spreading to the overall market.

Future changes to the cost price resulting from spot trading will also be based on the edited cost price. For example: If your trading account holds 1 BTC with a cost price of 60,000, and you transfer another 1 BTC from your funding account, your trading account will now hold a total of 2 BTC. If you then edit the cost price to 61,000, the cost price of the 2 BTC in your trading account will be updated to 61,000.

A price difference loss refers to a loss caused by the difference between the mark price at 9:07:26am UTC (48.36 USDT) and the resulting liquidation prices during the period. For example: If 10 OKB was liquidated at a liquidation price of 40.0 USDT, OKX will compensate difference of (48.36 - 40.0) * 10 = 83.6 USDT. Compensation will also include the associated liquidation penalty and trading fees (as determined by OKX), and exclude any bankruptcy losses already covered by the insurance fund.

The bot will place the order at the limit price if the order price is higher than the predefined limit price. If the order amount is more than the predefined average amount, the bot will place the order based on the average amount* random ratio (0.5~1). The order will be suspended when the last price (20,500 USDT) is higher than the limit price and resumed when the last price is below 10,500 USDT again. The bot will stop when the total filled amount equals the total order amount.

Assets > Token details Key changes - A new spot cost price feature has been introduced to provide users with a clear understanding of actual costs when they are engaged in spot trading. - Two algorithm options, average cost price and cumulative cost price, have been introduced to suit different trading preferences.

By setting up alerts, you establish a proactive defense mechanism, ensuring you're promptly notified whenever price action aligns with your price levels of interest. How can I set a price alert? You can set a price alert and be informed when the price reaches the key price points.

As of 11:00 am UTC on January 26, 2024, we are adjusting the mark price we are using to calculate account adjustments in reference to the OKB price volatility issue from 48.36 USDT to 52.73 USDT. Funds will automatically be deposited into user accounts. For any inquiries regarding the adjustments or eligibility, please contact us via the Support Center. Kind regards, OKX Team

Dear valued customers, Our ETH spot index price is affected by an error during an upgrade of the index system, causing the liquidations of positions of certain users from 12:12:05 - 12:21:55 and 13:04:05 - 13:13:55 Jan 25, 2019 (CET, UTC+1). Our team immediately responded and repaired the system once the error was found to minimize the impact. However, a few of our customers are still affected by the incident.

It can minimize the risk of forced liquidation caused by short-term manipulation of the latest trading price B.Formula of Mark Price Mark Price = Spot index price + moving average (basis) = Spot index price + moving average [(best buy + best sell) / 2 - spot index price] Mark Price takes into account the spot index price and the moving average of basis. The moving average mechanism smooths out temporary price spikes, reducing unnecessary liquidation under volatile market conditions.

You are more than welcome to send us an email at futures@OKX.com if you have any suggestions on the price precisions of other contracts. Your feedback is important to us as we continue to improve our services. Regards, OKX Oct 22, 2018