The way it is calculated is by finding the biggest difference between the current interest rate and the forecasted future interest rate. For instance, if a currency has an interest rate of 4%, and it is expecting to be at 1% in four quarters from now, that is more dovish than a currency at 2% and expecting 1%. However, if a currency’s interest rate is expected to be higher in the next four quarters, that would score as a hawkish reading.