On the trading screen, select Settings from the top menu Proceed with the selection of Settings from the pop-up menu On the Trading mode screen, select Spot cost price type Select between Average cost price or Cumulative cost price Select from the available options under the Spot cost price type options The cost price will also be reflected on your K-line Chart and the positions menu. Cost price on the K-line chart Cost price on the positions menu

Contract Type Relationship between S (final settlement price) and K (strike price) ITM/ATM/OTM Call options S>K ITM SK OTM S=K ATM What's the settlement currency for Options trading on OKX? OKX Options Orderbooks are settled in BTC or ETH instead of stablecoins. You can use stablecoins as margin if you trade in Portfolio margin or multi-currency cross mode.What's the index for contract in OKX Options trading? The underlying index is BTC-USD or ETH-USD.

We accumulate user asset values one by one, and fill the result into rows where k % 8 = 7, and , which are the last rows of each block We keep floor dividing each user's total value by 4 row by row from backwards of each block. We do it to keep the user's net value non-negative by checking if the first rows are zero for each block.

The rise and fall value of the latest transaction price compared to the opening price of the K-line 24 hours ago/100% of the opening price of the K-line 24 hours ago. The above formula data can be obtained through the market interface here. What's the reason for the error message "51000 Parameter posSide error" when placing an order? You need to check the account mode first; buying and selling mode/opening and closing mode, which can be viewed here to obtain posMode.