Function: band pass(divide(logn(round(mean(numbers("per") if numbers('xry') > numbers('ryy') else numbers("yxx"), numbers("per")), numbers("yxx") if numbers('ryy') > numbers('xry') else numbers("per"))), round(mean(numbers('xry') if numbers("per") > numbers("yxx") else numbers('ryy'), numbers("per")), numbers("per") if numbers('xry') > numbers('ryy') else numbers("yxx"))))
