Request Parameters

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New order type & options
We support the best order type as well as the ioc (Immediate or Cancel) and fok (Fill or Kill) functions.

The best order type is added to the ord_type field.

The time_in_force field is added. (Type: ioc and fok)

Field Name	Description	Type
market *	Market ID (required)	String
side *	Order Type (required) `bid` : Buying `ask` : Selling	String
volume *	Order Volume (Required when selling at the limit price or market price)	NumberString
price *	Order Price. (Required when selling at the limit price or market price)	NumberString
ord_type *	Order Method (required) `limit` : Limit Order `price` : Market Price Order(Bid) `market` : Market Price Order(Ask) `best` : Best Order type (`time_in_force` field is required)	String
identifier	User custom Value for Inquiries (Optional)	String (Uniq Value)
time_in_force	IOC, FOK, and Post Only Settings (Optional) ioc: Immediately executes the portion of the order that can be filled; cancels the rest. (Immediate or Cancel) fok: Executes the order only if the entire quantity can be filled immediately; otherwise, the order is canceled. (Fill or Kill) post_only: Places the order only if it would not immediately match with an existing order; otherwise, the order is canceled. The ioc and fok options are supported only when ord_type is set to`best` or `limit`. The post_only option is supported only when ord_type is set to`limit`.	String
smp_type	SMP (Self-Match Prevention) Type (Optional) `reduce` : Prevent matching by reducing the volume of both orders by the matched amount when orders from the same user are matched. `cancel_maker` : Cancel the maker order when orders from the same user are matched. `cancel_taker` : Cancel the taker order when orders from the same user are matched. The SMP is determined by the`smp_type` of the taker order. The `smp_type` of the maker order does not affect the prevention logic. Please refer to the [SMP Guide] for more details.

<span style={{color:'red'}}></span>Required\ <span style={{color:'orange'}}></span> Required under specific conditions

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Using the Identifier Parameter
The identifier is a user-generated key, not a system-issued UUID. It can be assigned to search an order and must be unique across all of the user’s orders. Once used, an identifier cannot be reused, regardless of the order’s status (filled, unfilled, or canceled).
Submitting a duplicate identifier will result in an error. Always generate a new uniqueidentifier for each order request.

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Market Price Order
For market price orders, please set the ord_type field to price or market.
For purchase orders, set the ord_type to price and set the volume to null or exclude it completely.
For sale orders, set the ord_type to market and set the price to null or exclude it completely.
For market price orders, ioc and fok functions are not supported.

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Best Order

Set ord_type field to best

Set time_in_force field to ioc or fok

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Ioc Limit Order & Fok Limit Order

Set ord_type field to limit

Set time_in_force field to ioc or fok

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Post-Only and SMP (Self-Match Prevention) Features Added (June 16, 2025 ~)

The post-only order condition

You can now set post_only as a value for the time_in_force field.

Only limit orders support the post-only condition and SMP is not supported in post-only orders.

The SMP (Self-Match Prevention) feature

Introduced the smp_type field with the following options: reduce, cancel_maker, cancel_taker

Response

Field Name	Description	Type
uuid	Unique Order ID	String
side	Order Type	String
ord_type	Order Method	String
price	Currency Price at the Time of Order	NumberString
state	Order Status	String
market	Market Unique Key	String
created_at	Order Generation Time	String
volume	User Input Order Volume	NumberString
remaining_volume	Remaining Order Volume after Trade	NumberString
reserved_fee	Ratio Reserved as Fees	NumberString
remaining_fee	Remaining Fees	NumberString
paid_fee	Used Fees	NumberString
locked	Ratio being used in Transactions	NumberString
executed_volume	Traded Volume	NumberString
trades_count	The number of Transactions in the order	Integer
time_in_force	IOC, FOK, Post Only settings	String
identifier	User custom value for query *Provided only for orders created after October 18, 2024	String
smp_type	SMP (Self-Match Prevention) Type	String
prevented_volume	Total cancelled volume by SMP	NumberString
prevented_locked	(Buy) The amount canceled due to the Self-Match Prevention (SMP) setting. (Sell) The volume canceled due to the Self-Match Prevention (SMP) setting.	NumberString

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