SHEX definition
SHEX. ’ means that if, after entry into the System, an order is not fully executed, the order (or the unexecuted portion thereof) will remain available for potential display and/or execution for the amount of time specified by the entering Participant (up until 5 p.m. on the day entered) unless canceled by the entering Participant.
SHEX means Saturdays, Sundays and Holidays excluded.