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To ensure appropriate and efficient messaging practices for TAS orders into CME Globex, the timing of each TAS groups’ pre-open state is randomized. The market state sequence for TAS groups has a market pause, communicated via the market data Security Status message (tag 35-MsgType=f), tag 326-SecurityTradingStatus=2 at 16:1500:00 on Sunday and 16:45:00 Monday through Thursday. TAS groups then go into pre-open on Sundays between 16:1500:00 and 16:1601:00 Central time (CT), and Mondays through Thursdays between 16:45:00 and 16:46:00 CT.