Top Messages

    
    0xB1        Time Reference (C1 Only)
    0x20        Time
    0x97        Unit Clear
    0x2E        Symbol Mapping
    0xD4        Single Side Update Expanded (Short)
    0xD5        Single Side Update Expanded (Long)
    0xD6        Two Side Update Expanded (Short)
    0xD7        Two Side Update Expanded (Long)
    0xB8        Top Trade
    0xD1        Options Auction Update
    0x96        Auction Summary
    0x31        Trading Status
    0xD2        Width Update
    0x2D        End of Session
    0x9D        SOQ Strike Range Update
    0x9E        Constituent Symbol Mapping