How are options exercised?
There is no manual exercise step. Contracts are settled automatically in cash at expiry (08:00 UTC). See Settlement & Expiry.Are trigger orders or leverage supported?
No. Only limit and market orders are supported, and leverage / margin-mode updates do not apply. See Order Lifecycle.Where do mark price, IV, and Greeks come from?
They are published continuously on the Contracts Stream and derived from the Black-76 model. To compute values for a specific candidate price yourself, see Pricing & Greeks.How do I list what’s currently tradable?
Subscribe to the Contracts Stream, or use the Get Expirations and Get Contracts REST endpoints.How do I verify an order and safely retry?
If a request times out or you miss an acknowledgment, do not blindly resubmit. Check the order’s status after a short wait — via the Open Orders Stream, or over REST with Get Order Status when you have theorderId and
Get Open Orders when you do not — and only retry if
it is confirmed missing. Use a unique clientRequestId per request so you can correlate
acknowledgment, confirmation, fills, and errors.