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An ECN Drop Copy Feed provides a sequenced copy of all trades done on the ECN. The set of trades sent is determined by the permissions assigned by the ECN.

The Drop Copy Feed does not provide for subscriptions to market data nor allow for trading; however subscriptions are still necessary. The MFAPI client needs to subscribe to trading. The Customer Application is assigned permission to receive Drop Copy messages via the MFAPI login assigned by MarketFactory.

Not all ECNs provide this functionality. You can check if a given feed is a Drop Copy Feed by looking at the APIFeed.flags bitmask and comparing it with FeedFlag.DROPCOPY.

For feeds having complex counter party information the counterpartyId field will contain a
JSON object representing the information. (See Feed specific appendix for details)