Can't find field when building saved search

Hi,

I am trying to build a saved search for our finance team.  They are trying to build a search to report on accounts from the balance sheet.  There is a check box on each account with the title: "Revalue Open Balance for Foreign Currency Transactions".  Obviously the box is either checked or unchecked.  I would like to be able to search on whether or not this box is checked but cannot seem to find this field anywhere in the listed fields of the saved search.

When I click on the name of the field, the description reads:
"Indicates whether this account can be selected for open balance currency revaluation"