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Order IDs/Execution IDs

Note that Order IDs and Execution IDs are 12 characters base 36. The 1st character of an Execution ID may be used to differentiate between internal matched trades, internal auction fills, and routed trades as follows:

  • 0 (zero) = Cboe Internal Match
  • C = Auction Fill
  • M = Cboe Market Close Trade
  • R = Routed Trade
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Cboe Titanium U.S. Equities TCP Depth of Book (PITCH) Specification - Order IDs/Execution IDs | Cboe