Header & Trailer

Standard Header

Tag	Name	Data Type	Req’d	Description
8	BeginString	String	Y	Must be FIXT.1.1 for FIX 5.0 protocol version. Must be the first field in the message.
9	BodyLength	Length	Y	Must be the second field in the message.
35	MsgType	String	Y	Message type. Must be the third field in the message.
34	MsgSeqNum	SeqNum	Y	Message sequence number.
49	SenderCompID	String	Y	Company identifier as allocated by NDAX
56	TargetCompID	String	Y	Receiver FIX session identifier. Always INDAX.
50	SenderSubID	String	N	A text field to indicate the name or identifier of the person or entity submitting the trade.
142	SenderLocationID	String	N	ISO identifier of message originator's location.
1128	ApplVerID	String	N	Indicates the protocol being used in this message. Supported values: 9 = FIX50SP2
57	TargetSubID	String	N	Identifies specific trading unit. Conditionally required for Application messages. Always ZERO.
52	SendingTime	UTCTimestamp	Y	Time of message transmission.
369	LastMsgSeqNumProcessed	SeqNum	N	The last MsgSeqNum (34) value received and processed. Used to detect a backlog.

Standard Trailer

Tag	Name	Data Type	Req’d	Description
10	CheckSum	String	Y	Checksum of message and end of message delimiter.