Access from the Insert Scan - Scan Criteria dialog and select Indicator from the Field drop-down list. TradeStation Help
The Select Indicator dialog allows you to choose the desired indicator you want to use as the criteria for your scan.
Access from the Insert Scan - Scan Criteria dialog and select Indicator from the Field drop-down list.
Name/Short Name/Modified 
Contains the indicators that are available to insert into the scan. For easier access, the Name, Short Name and Modified columns can be sorted.
Click OK to apply changes or Cancel to exit without changes.
The indicator is added to the Insert Scan - Scan Criteria Field box.