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An Internal Drop Copy Feed provides a sequenced copy of trades done within the Whisperer system. Each Drop Copy Feed feed may be configured to include all trades possibly filtering by user , feed, market, or a combination of all threeand/or feed. This configuration is done server-side, and the user is requested to contact MarketFactory support for this, depending on the former's requirements.

Subscription is necessary in a similar fashion to the ECN Drop Copy Feeds.Main Thread MFHandler MFClient
.submitOrder()
APIResult::OK
.onOrderReceived()
.onOrderSubmitted()
.onTradeCapture()
.onOrderDone()
Figure 8.12. – Complete IOC fill using Order Feed subscription.

MFClient#subscribeOF(dropCopyFeedId)

While subscribed you will recieve a DropCopy message for each trade done by the configured user and/or feed via the MFClient#onDropCopy callback. 

<DropCopy ( sequenceID=5  customerClientID="TEST"  customerAccountID="demo-001"  userName="demo-001"  onBehalfOfCompID="" onBehalfOfSubID=""  clOrdID="1689622175747"  exOrdID="Z006TI1PAP"  exPendingID=""  exTradeID="1689622175747" modelID="{ "MsgType": "TradeCaptureMessage", "BaseCurrAmt": "1000000.00000", "CounterCurrAmt": "138637000.00000", "SettlCurrAmt": "0.00000" }" timeExchange=1689622176142000000  timeHandler=1689622176177838460 timeApiServer=1689641042268547336  timeApiClient=1689641042334000000  feedID=9  origFeedID=11  marketID=1  side=OFR  price=138.637000000  origPrice=0.000000000  baseCurrAmt=1000000.000000000  baseCurrency="USD" counterCurrAmt=138637000.000000000  counterCurrency="JPY" settlCurrAmt=0.000000000  settlCurrency="USD"  isTaker=true  matchStatus=DONE  counterPartyID="BARX" tradeDate=1689552000000000000  settlDate=1689724800000000000 )

You will only receive DropCopy messages from the moment you successfully subscribe. You can use the MFClient#replay(feedId, startSequenceID, endSequenceID) to replay earlier/missed DropCopy messages.