# OKX (formerly OKEx) Enumerations

OKX (formerly OKEx) is a major Seychelles-based cryptocurrency exchange founded in 2013 by Star Xu as Okcoin. It rebranded in 2022, offering spot, derivatives, and Web3 services. Known for high security, it is owned by Ok Group, but not available to users in the USA

The following fields have Enumerations:

* AGGRESSOR_SIDE - Indicates whether a trade resulted from an incoming buy or sell order.
* QUOTE_VENUE - Venue (MIC) from which a quote originates
* TRADE_VENUE - Identifies the venue where a trade was executed.   Typically a MIC, with the special values “XOFF” for off-exchange and “SINT” for Systematic Internaliser trades.
* TRADE_PERIOD - Market period during which a trade was executed.
* BOOK_TYPE - Type of order book or trading mechanism through which a trade was executed.

#### AGGRESSOR_SIDE - Enumeration

| Enumeration ID   | Enumeration Description   |
|------------------|---------------------------|
| B                | Buy                       |
| S                | Sell                      |

#### QUOTE_VENUE - Enumeration

| Enumeration ID   | Enumeration Description   |
|------------------|---------------------------|
| OKX              | OKX                       |

#### TRADE_VENUE - Enumeration

| Enumeration ID   | Enumeration Description   |
|------------------|---------------------------|
| OKX              | OKX                       |

#### TRADE_PERIOD - Enumeration

| Enumeration ID   | Enumeration Description   |
|------------------|---------------------------|
| -                | Regular trading           |

#### BOOK_TYPE - Enumeration

|   Enumeration ID | Enumeration Description   |
|------------------|---------------------------|
|                0 | Lit order book            |