To enhance feed efficiency and stability, OKX is scheduled to deprecate the checksum field across WebSocket order book channels. The deprecation will take effect on the demo environment on 2 June 2026 and on the production environment on 23 June 2026. The change applies to the books, books-l2-tbt, and books50-l2-tbt channels . After the deprecation date, the checksum field will remain present in push messages but will always return 0 and must no longer be used for data integrity validation.

You can either enter the address or select the address in your address book. If there's no address available, you can select Add address or Manage address book to add a new address to your address book. Open your address book 4. Select Add address and select your preferred options; whether single address or multiple addresses. Note: when adding address, you can save the network selected as an EVM network address to withdraw other crypto from this network.

Accept the speed bump applied before the order enters OKX’s system.Are ELP orders visible in the order books? API order book ELP orders will be excluded from current order book REST endpoints or WebSocket channels. GET /api/v5/market/books GET /api/v5/market/books-full WebSocket: books/books5/bbo-tbt/books-l2-tbt/books50-l2-tbt There will be a new WebSocket channel to include all ELP orders only (both valid and invalid orders).

With this feature enabled, you can only withdraw to addresses saved in your address book. To add a new address, simply add it to your address book prior to withdrawing. If your account is compromised, the extra layer of protection will prevent you from withdrawing funds to any unauthorized addresses.Getting started Open your OKX App, go to Assets > Withdraw > Select Withdraw crypto > Select crypto 2. Select Address book > Tap Address Settings icon in the top-right corner 3.

Order Book & Pricing Price equals probability. Each share is priced between 0.001 and 0.999 USDT, directly reflecting the market's collective assessment of the probability that the event will occur.The order book is a list of all unfilled buy and sell orders in a market, divided into two sides (bid and ask). Spread is the gap between the highest bid and the lowest ask. A tighter spread indicates better market liquidity.

Address book updates We've updated the address book with new Network scope and Token scope options, giving you more flexibility and control over which networks and tokens each saved address applies to. When you're making a withdrawal, the address book also automatically filters addresses based on the network and token you've selected. What do "Network scope" and "Token scope" mean when I add an address? These new options give you more flexible and secure control over your withdrawal addresses.

Supports placing orders by contract quantity If the order price can be matched immediately against the current order book, it is filled immediately (Taker) If it cannot be matched immediately, it rests in the order book and waits (Maker) (2) Market Order No price is specified; the order is filled immediately at the best available price in the current order book. Suitable for users who want to enter or exit positions quickly.

During the contract's life, users can sell their shares on the order book at any time to lock in gains or cut losses — no need to hold until expiry. Peer-to-peer trading of opinions; price equals probability. Buyers and sellers are matched through a unified order book. Prices are determined by market supply and demand with no platform price intervention, ensuring fair pricing. An Up quote of 0.5 USDT indicates the market assigns approximately 50% probability to the event occurring.

Order rules Supported order type: Limit orders only Market orders: Not supported All eligible users may participate in pre-open Orders that meet the pricing requirements will remain in the order book when trading begins.Orders that do not meet the pricing requirements may be cancelled at the end of the pre-open period. After the Pre-open After the pre-open ends: Continuous trading begins shortly after the pre-open ends. Previously placed limit orders stay active in the order book.

On the deposit page, select Address > Add address Go to address book page to add new addressHow do I edit the name of a deposit address? On the deposit page, select Address > Edit > Edit the deposit address name Select the edit from the address book page to editHow do I change my deposit address?

Find any Verified Address not added by you > Select Delete > Confirm twiceOn the app Log in > Go to Assets > Select Withdraw Choose the withdrawal currency > Select network Select the Address Book > For any Verified Address not added by you, swipe left to deletePasskey To review or manage your Passkeys: Open the OKX App > Select Menu Go to Profile and Settings > Select Security > Enter the Security Center Select Security on the user center page Select Passkeys Check if there are any Passkeys you

Consider using the Address Book feature in your OKX account to save frequently used addresses safely. Enable security reminders and confirmations in your account settings to reduce mistakes.

A taker order occurs when you place a trade that is immediately filled against an order already on the order book. Taker orders incur a fee based on the taker fee rate. A maker order happens when you place an order that goes on the order book with a set price and quantity, such as a limit order that sits on the book until matched. Maker orders are charged a fee based on the maker fee rate. Maker orders add to the order book’s liquidity, providing more depth to the market.

5 orders will be placed in the order book 1st limit buy order will be placed at the current middle price (Ask 1 + Bid 1)/2 The 2nd limit buy order will be placed at Bid 1 price, whereas the 3rd one at Bid 2 price, etc The amount per order is around 0.1 BTC (multiplied by the random number) If the price goes up to higher than 35,000, the order would be temporarily halted If the order is filled, new orders will be placed according to the latest position in the orderbook If the change of price causes

Then, submit the request and complete the necessary password or verification steps.Important note: If you’re withdrawing to a saved address from your address book, the Tag/Memo field may not appear, as it was already saved when the address was added. If you're unsure whether the receiving platform requires a tag/memo, contact them to confirm before proceeding. Never enter random digits — submitting an incorrect tag/memo may result in permanent loss of funds.