How to submit a Sell order
Navigate to the Trade screen by tapping the lightning bolt icon at the bottom of your app screen. Tap the Trade button.
Tap the Trade Options button. BTC/USDT options are selected by default for now. More types of derivatives contracts will be available for selection in future.
In the following example we'll be Selling 0.0005 BTC Call option contracts with 28 May 2021 expiration and 75,000 USDT strike price.
Toggle the Buy/Sell selector to "Sell" and the Call/Put selector as desired. The user interface's accents will change from green (Calls) to red (Puts) depending on the type of contract you select. Select your desired Expiration Date at the top of the screen to bring up the options chain screen. You can scroll up or down to see more strike prices. Each corresponding limit price (the highest bid price) is displayed in a box to the right of the strike price.
Tap on your desired strike price to bring up the order screen. Enter the amount of contracts you would like to buy. Contracts can be fractioned to 4 decimal places, but the minimum value of the transaction is 1USDT. Tap the Review button once you are ready.
This will bring up the order review screen. Swipe upwards from the bottom of the screen to complete your order.
Congratulations! Your order has now been accepted. Tap the Done button to exit this screen.
For the time being, writing options contracts has a 100% collateral requirement. That means that you must keep enough funds in your account to fully cover the notional value of your sold options contracts in order to continue trading.
If an account's balance somehow becomes less than the collateral requirement of all open positions, the account will not be able to submit new orders to open new positions, increase existing positions, or withdraw any funds. Full trading functionality will be restored once enough positions have been reduced or closed, or more funds have been deposited to bring the account balance back above the collateral requirement.