The thing to remember about currency fields is that even if you tend to
only put one currency value in it, any question of interpreting the values
in that field has to be done relative to a specific currency, and the
exchange rates may change dynamically.
So use the currency function to get a numerical value in some explicit
currency at the moment you execute the query, and then do stats over that
function.
Something like this IIRC: stats.field={!func}currency(your_field,EUR)
-Hoss
http://www.lucidworks.com/
