In order to make users better understand price limit, and convenient for users to trade, the highest price of buy order and lowest price of sell order are calculated as follows: Highest price of buy order = Mark price of options + Adjustment coefficient * Max (0.004, 0.016 * abs (Delta)); Lowest price of sell order = Mark price of options - Adjustment coefficient * Max (0.004, 0.016 * abs (Delta)); OKX may adjust the above parameters according to certain market conditions, and the adjustment coefficients

Otherwise, USDT-USD hedging volume = Min {Abs (USDT cash delta), Abs (USD cash delta)} Step 3: Calculate MR9 based on tiers. Calculate using the 3 cross-currency hedging volumes calculated in step 2: [USDT-USD hedging volume], [USDT-USDC hedging volume], [USDC-USD hedging volume], and index prices for [USDT/USD], [USDC/USD], and [USDT/USDC]. Then, refer to the different tiers in the tables below to determine the MR9 factor.

For parameters of open interest limits for expiry futures, please refer to: https://www.okx.com/trade-market/info/futures For parameters of open interest limits for perpetual futures, please refer to: https://www.okx.com/trade-market/info/swap For rules on platform position limit values for perpetual futures, refer to: https://www.okx.com/trade-market/info/swap Open API query: https://www.okx.com/docs-v5/en/#trading-account-rest-api-get-instruments Note: The relevant thresholds or parameters would