Filter the records in Query Range based on Date

Hi all,

 I want to filter the record in Customer Transaction(CustTrans), the Closed date should empty OR greater than Today.
 

i am tried with

criteriaOpen = this.query().dataSourceNo(1).addRange(fieldNum(CustTrans,Closed));

criteriaOpen.value(strFmt('(%1.%2 == "") || (%1.%2 < %3)',
                        this.query().dataSourceNo(1).name(), fieldStr(CustTrans, Closed), today()));

its not working.