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Examples of the field information that can be included withinTradeCapturemessage are below. The table below is not exhaustive as many venues use custom Fix Tags to convey a significant amount of counterparty information

NumberFix TagNameDescriptionJSON Example
1"17""ExecID"Unique identifier of execution message as assigned by sell-side
(broker, exchange, ECN) (will be 0 (zero) for ExecType (50) =I
(Order Status)). Uniqueness must be guaranteed within a single
trading day or the life of a multi-day order.
 
2"30""LastMkt"Market of execution for the last fill, or an indication of the market
where an order was routed.
{"LastMkt":{"ID":"Hotspot"}}
3"375""ContraBroker"Identifies the contra broker. 
4"1""Account"Account mnemonic as agreed between buy and sell sides 
Info
titleCaution

Where Counterparty handling is employed, the feature operates across all Feeds/Connections, and cannot be isolated to individual sessions.