The order handling rules associated with CME Globex futures transactions contain restrictions regarding the relationship between the order limit price and stop price which may not exist in other market venues. In the case of a Sell Stop Limit Order, the limit price must be less than or equal to the stop price (<=).  In the case of a Buy Stop Limit Order, the limit price must be greater than or equal to the stop price (>=).  Sell (Buy) Stop Limit Orders entered outside this convention will generate the following error message: “LMT price should be less than or equal to (equal to or better than) STP price