TOP Messages

    0x20        Time
    0x2D        End of Session
    0x31        Trading Status 
    0xB1        Time Reference
    0xB2        Market Snapshot (Short)
    0xB3         Market Snapshot (Long)
    0xB4        Single Side Update (Short)
    0xB5        Single Side Update (Long)
    0xB6        Two Side Update (Short)
    0xB7        Two Side Update (Long)
    0xB8        TOP Trade
    0xB9        Settlement
    0xBA        End of Day Summary
    0xBB        Futures Instrument Definition
    0xBE        Price Limits
    0xD3        Open Interest
    0xFA        Futures Variance Symbol Mapping