- u -

• Undefined : TradeInputSource , OrderCapacity
• Unknown : AccountCode , Side
• UnknownOrder : RejectionReason
• UnknownSymbol : RejectionReason
• UpdateAsResultOfTrade : MarketMakerPositionUpdateReason
• UpdateAsResultOfUserRequest : MarketMakerPositionUpdateReason
• USER_ALREADY_LOGGED_ON : ReturnCode
• USER_SPECIFIED_MISSING : ReturnCode
• UserLockedOutByExchange : UserStatus
• UserLockedOutByMonitor : UserStatus
• UserUnlockedByMonitor : UserStatus