User session token
Order side; buying ("B") or selling ("S")
B, S Order price in USD as decimal string; e.g. "1.2345"
Whether the order is post-only (maker-or-cancel)
Order quantity in contracts; e.g. 100, 1000
x >= 0Order symbol; e.g. GBPUSD-PERP, EURUSD-PERP
Order time in force; e.g. "GTC", "IOC". "DAY" is accepted but deprecated and will be removed in a future release — use "GTC" instead.
Optional client order ID; 64 bit integer
x >= 0Self-trade prevention behavior (defaults to rejecting the incoming aggressor)
CancelIncoming, CancelResting, CancelBoth Optional order tag; maximum 10 alphanumeric characters
Initial margin requirement preview