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Mark price and Last price
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.Published on Jun 16, 2022Updated on Nov 17, 2025Product documentationAdjustment of Price Limit Rules for Futures & Perpetual Swap and Funding Rate Rules for Perpetual Swap
Formula of price limit: Period Max Buy Price Min Sell Price Within 10 minutes after the contracts launched Index *(1+X) Index *(1-X) Contracts launched 10 minutes later Min[Max(Index, Index *(1+Y)+ price movement average within the last 10 mins), Index *(1+Z)] Max[Min(Index, Index *(1-Y)+ price movement average within the last 10 mins), Index *(1-Z)] 2.Published on Oct 14, 2020Updated on Nov 17, 2025AnnouncementsSpot cost price
Asset Overview Spot Cost Price Definition: A weighted average of the cost prices and quantities across the Trading Account, Funding Account, and Earn Account. Transfers between these accounts do not affect the cost price. Example: If the Asset Overview shows 1 ETH with a cost price of 3000, and this ETH is transferred from the Funding Account to the Trading Account, the Asset Overview cost price remains 3000.2.Published on Jun 17, 2022Updated on Nov 6, 2025Product documentationPrice limit rules
Price limit is one of the important risk control methods to protect investors and prevent the market from being manipulated. If there is no price limit, a few traders can make the contract price fluctuate greatly and create a large apportionment, by using a small amount of funds and a high leverage level.Published on Jun 16, 2022Updated on Jan 28, 2026Product documentationSpot index prices
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.Published on Jun 16, 2022Updated on Nov 5, 2025Product documentationHow do I sell NFTs ?
How do I sell NFTs on App? Open OKX App and connect your OKX wallet Non Trader Mode : Select More - NFT or Trader Mode : Explore - NFT 3. Select the NFT you would like to sell and select List for sale to set your preferred NFT market(s), expiration and price (the price can be set differently or the same prices for an NFT on various markets) 4. After confirming the gas fee, service fee and royalty, select Sell to proceed with the listing of your NFT 5.Published on Aug 22, 2023Updated on Apr 3, 2026FAQ956Multi-currency margin mode: cross margin trading
Currency USD Price Balance Position Floating PnL Equity BTC 100,000 2 NA 0 2 SOL 200 6,000 NA 0 6,000 USDT 1 100,000 BTC-USDT perpetual position 10,000 110,000 Given that you set the borrow leverage of BTC to 5x and you place a sell order of 4 BTC in the BTC-USDT pair. Thus, frozen equity is incurred. However, the frozen equity is larger than your BTC equity, which means your equity isn’t enough to cover the frozen equity.Published on Mar 21, 2023Updated on Mar 27, 2026Product documentationBorrowing and repaying in multi-currency and portfolio margin account modes
Funding fee for perpetual futures In perpetual futures, if the equity of a crypto is insufficient to cover the funding fee when it is collected, potential borrowing will incur. Assume your account has 10,000 USDC and a BTC-USDT perpetual contract cross-margin position. When the funding fee is collected, 10 USDT is deducted from your balance. Your USDT equity becomes –10 USDT and liability of 10 USDT is incurred.Published on Apr 4, 2025Updated on Jan 30, 2026Product documentationBorrow in spot mode
Validation for auto-borrow ordersAdjusted equity is sufficient Crypto Equity Current Price (USD) In use Discount rate BTC 0.1 60,000 0 0.98 ETH 1 3,000 0 0.98 USDT 0 1 0 1 Place an auto-borrow order to sell 6,000 USDT at a price of 60,000 BTC/USDT (Assuming leverage is 2x and there are no trading fees or interest) Adjusted equity = 0.1 BTC x 60,000 x 0.98 + 1 ETH x 3,000 x 0.98 - 60,000 x 0.1 x (1 - 0.98) = 8,700 USD Frozen margin inclusive of the current order placed = 6,000 / 2 = 3,000 USD SincePublished on Sep 19, 2024Updated on Nov 18, 2025Product documentationIntroduction to spot mode
“Available” in “Sell BTC” shows you the current BTC balance you can sell, while "Max sell" shows you the amount of USDT obtained after selling BTC based on the last price of BTC/USDT. Enter an appropriate BTC purchase price and amount, and click “Buy BTC” to place the order. (Likewise for selling) Your buy/sell orders can be viewed on the Open Orders and Order History lists.Published on Dec 23, 2020Updated on Nov 17, 2025Product documentationUpgrade on Liquidated Futures Position Price Calculation and Price Change Strategy for Liquidated Futures Positions
The margin call losses caused by the difference between the bankruptcy price and transaction price will be shown in the forced-liquidation list. b.The margin call losses caused by liquidated positions after price changes will be cleared with the margin call losses from unfulfilled liquidated positions altogether. The total loss will be compensated by the insurance fund.Published on Feb 20, 2019Updated on Nov 17, 2025AnnouncementsUpdates to the spot cost price feature
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.Published on Oct 18, 2024Updated on Nov 19, 2024AnnouncementsUpdate Regarding OKB Price Volatility
Adjustment rules and calculation parameters Account adjustment for eligible users (to be determined at OKX's sole discretion) will cover the price difference loss, as calculated by OKX, that resulted from forced selling of OKB at a lower price during a liquidation and any liquidation penalties and transaction fees associated with the liquidation.Published on Jan 25, 2024Updated on Nov 17, 2025AnnouncementsTime-weighted Average Price (TWAP)
Assuming the order book is as below: According to the predefined price range, the highest buy price equals the Best Bid Offer (BBO), which is 10029.99*(1+price range 1.0%) = 10130.29 USDT. The total amount of sell orders below 10130.29 USDT is 570+1+200+1+1+1+1=775,and multiply the random number between 0.5 to 1 (e.g., 0.63) to get the order amount=775*63%=488.25 contracts.Published on Jun 17, 2022Updated on Apr 1, 2025Product documentationWhat is smart sync spot copy trading?
Some copy trade orders may fail, which will result in a different average buy or sell price. You can view the reasons in our support center article. Due to price fluctuations or factors like market depth, your buy and sell prices may differ slightly from the lead trader. Why is the amount I buy higher or lower than the lead trader? In smart sync copy trading, asset allocation for your trades is proportionate to the lead trader.Published on Oct 24, 2024Updated on Feb 9, 2026Product documentation