Multicast PITCH provides a history of real-time depth of book quotations and execution information with nearly half the latency of TCP PITCH and 20% fewer PITCH events. This is achieved by using binary messages (PITCH 2.0).

The historical Multicast PITCH data dates back to 04/30/2012 for the CXE exchange and to 05/03/2011 for the BXE exchange.
To see the Multicast PITCH file format please refer to the specifications below:
http://cdn.batstrading.com/resources/participant_resources/BATS_Europe_MC_PITCH_Specification.pdf

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https://markets.cboe.com/about/hours/european-equities/