FIX Protocol Tag 11: ClOrdID
Unique identifier for the order, assigned by the firm that sends it (buy side, broker or other intermediary). It must be unique within a trading day, and firms that send multi-day orders should keep it unique across days. Every cancel or replace request carries a new ClOrdID.
- Tag number
- 11
- Data type
- STRING
- FIX versions
- FIX 4.0 to 5.0 SP2
- Used in
- 43 message types
Practical notes on ClOrdID
ClOrdID is the identifier the client gives to each order request: the New Order Single and every cancel or replace that follows.
- Every request needs a new ClOrdID. A cancel or replace carries its own ClOrdID and points at the order through OrigClOrdID (41).
- Most venues require ClOrdIDs to be unique for at least the trading day; many expect uniqueness for the life of the session.
- Execution Reports echo the ClOrdID of the request they answer, which is how the client matches them.
Common mistakes
- Reusing the ClOrdID of a rejected order. Many venues reject the new order as a duplicate.
- Generating IDs from a counter that restarts with the process.
See also:FIX order lifecycle explained
Tag 11 in each FIX version
Values and message usage as defined in a specific version.
Data type
STRING: Text of printable characters. It cannot contain the SOH delimiter.
Example
11=ORD-20261020-0001
Illustrative value. In a message, fields are separated by the SOH character (0x01), often shown as | or ^ in logs.
Decode a message with this tagMessage types that use tag 11
- Execution Report 35=8
- Order Cancel Reject 35=9
- Email 35=C
- New Order Single 35=D
- New Order List 35=E
- Order Cancel Request 35=F
- Order Cancel/Replace Request 35=G
- Order Status Request 35=H
- Allocation Instruction 35=J
- List Status 35=N
- Quote Request 35=R
- Settlement Instructions 35=T
- New Order Multileg 35=AB
- Multileg Order Cancel/Replace 35=AC
- Trade Capture Report Request 35=AD
- Trade Capture Report 35=AE
- Quote Response 35=AJ
- Confirmation 35=AK
- Trade Capture Report Ack 35=AR
- Allocation Report 35=AS
- Collateral Request 35=AX
- Collateral Assignment 35=AY
- Collateral Response 35=AZ
- Collateral Report 35=BA
- Collateral Inquiry 35=BB
- Collateral Inquiry Ack 35=BG
- Confirmation Request 35=BH
- Allocation Instruction Alert 35=BM
- Execution Ack 35=BN
- Order Mass Action Report 35=BZ
- Order Mass Action Request 35=CA
- Trade Match Report 35=DC
- Mass Order 35=DJ
- Mass Order Ack 35=DK
- Trade Aggregation Request 35=DW
- List Strike Price 35=m
- Registration Instructions 35=o
- Registration Instructions Response 35=p
- Order Mass Cancel Request 35=q
- Order Mass Cancel Report 35=r
- New Order Cross 35=s
- Cross Order Cancel Replace Request 35=t
- Cross Order Cancel Request 35=u
Covers every version from FIX 4.0 to 5.0 SP2, including fields reached through components and repeating groups. The version pages above show whether the tag is required in each message.
Field and message data comes from the QuickFIX data dictionaries for FIX 4.0 to 5.0 SP2 and FIXT 1.1, used under the QuickFIX Software License. This product includes software developed by quickfixengine.org (http://www.quickfixengine.org/). Enumerated value names are converted to plain text for reading.