Account address which is placing the order.

The order that will be replaced by this modify request

The instrument to buy or sell.

Size of position to trade in the underlying asset.

Can be buy or sell.

Can be limit, market, take_profit, or stop.

Can be one of gtc (Good til cancelled), gte (Good til expiration), ioc (Immediate or cancel), or fok (Fill-or-Kill).

Can be post_only or allow_cross. post_only is only supported for limit orders.

Signed order fields which are submitted to smart contracts for processing.

ID assigned to the order by the client. This must be unique per-account. Will be set automatically to the exchange's unique order_id if absent.

Limit price for the order. If this field is absent, null, or zero for take_profit and stop orders, the order will execute at market once the trigger_price is reached. This field must be absent, null or zero for market orders.

Used to make orders with otherwise identical signed fields unique. See nonce section in glossary for specific requirements.

If true, this order will only reduce the size of an open position. Always true for take_profit orders.

The reference price at which the order will become active. Required for take_profit and stop orders. Ignored for other order types.