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Page Revision: 2012/12/20 15:11


Session Initiation

After a successful SSL connection, the T4 FIX API basic requirement is to have both the Initiator and Acceptor start with sequence number 1. The client will initiate the FIX Session by sending a Logon Message to the T4 FIX API server. Successful authentication will be responded with a Logon message echo. The Password field (Password - Tag 554) of the API server logon message will be identified with an asterisk.

Drop of a physical connection will result in the end of a FIX Session. Upon reconnection, the client is required to start a new FIX Session with sequence number 1. The T4 API server will appropriately respond with messages starting with sequence number 1.

Authentication Requirements

After a successful physical connection to the T4 FIX API server, authenticated access is achieved with the following T4 input parameters in the client's Logon message:

Tag NameTag NumberDescription
TargetCompId56T4 Firm
SenderCompId49T4 Application Name
SecureData91License Code for the T4 Application
SecureDataLen90Length of License Code string
UserName553T4 User
Password554T4 Password

Failure to provide the correct parameters in the Logon message will result in an logon failure. Appropriately, a Logout message will be sent to the client. The Logout message will contain a short description of the failure to help determine the cause of failed authentication. Thereafter, a physical disconnection will occur. As the FIX Session failed, the T4 FIX API will expect a new attempt for a new FIX session. The next Logon message (from the client) must start with sequence number 1.

Setting FIX Session Properties upon Logon

The T4 FIX API provides enhanced control of FIX Session functionality. Upon a successful authentication, the optional RefMsgType group allows the user to set session properties with the embedded RefMsgTypes. Upon longin, the T4 FIX API processes such RefMsgType's and applies the requests during the duration of the FIX session. The functionalities include the ability to control the messages transmitted during order entry (i.e. pending reports), the pricing format (i.e. decimal or ticks) of order submittal, auto subscribition to all user accounts and listing of the current portfolio orders, fills, positions and associated contracts.

Message Dictionary

TagField NameReq'dComments
Standard HeaderYMsgType = A
91SecureDataYLicense Code for the T4 Application
90SecureDataLenYLength of License Code string
49SenderCompIDYT4 Application Name
56TargetCompIDYT4 Firm
553UserNameYT4 User
554PasswordYT4 Password
BodyY
98EncryptMethodYValue = None. Always Unencrypted.
108HeartBtIntYHeartbeat interval. Set to 30 seconds.
Start Repeating Group
384NoMsgTypesNNumber of referenced MsgTypes (35) in repeating group.
372RefMsgTypeNSets MsgTypes for various FIX Session functionalities. Required if NoMsgTypes is > 0. The following MsgTypes set FIX Session properties as described below:
BB = Upon successful logon, it automatically subscribes to all accounts of the logon user.
8 = Enables Pending Execution reports for order submittal, cancel replaces and cancel requests.
d = Upon a successful logon, it inhibits the listing of portfolio orders, positions and related contracts.
D = Enables Decimal pricing in order entry, amendment and cancellation.
BA = Enable Drop Copies only. All account events are reported but order submittal is disabled.
CB = Disable User Notifications. Account notices, exchange notices and market RFQs are not received.
End Repeating Group
Standard TrailerY

Sample Message


>> 11/5/2012 5:50:55 PM   [FIXLOGIN] 34=1|49=T4Example|56=T4|52=20121105-23:50:55.492|91=64768859-3ACF-4224-A4E9-DA66901AFC63|90=36|98=None|108=30|553=_tradername_|554=_password_|
[FIXLOGIN]
[MsgSeqNum] 34 = 1
[SenderCompID] 49 = T4Example
[TargetCompID] 56 = T4
[SendingTime] 52 = 20121105-23:50:55.492
[SecureData] 91 = 64768859-3ACF-4224-A4E9-DA66901AFC63
[SecureDataLen] 90 = 36
[EncryptMethod] 98 = None
[HeartBtInt] 108 = 30
[UserName] 553 = _tradername_
[Password] 554 = _password_


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