SelectOption: High
Here you can specify the "high" value (case sensitive!).
The "high" value has to be given in case you specified "BT" (between) or "NB" (not between) as the operator in the "option" field. Of course the "high" value must not be smaller than the "low" value, resp. for non-numeric values (characters and strings) the "low" value must not be after the "high" value in the lexicographical sort order.