9. The method of claim 7 , wherein the predetermined threshold is 0.8.
7. A method for forecasting keyword search volume performed by a computing device having a processor and memory, the method comprising: determining a seasonal correlation value for a plurality of directly forecastable keywords by calculating a Pearson correlation value, wherein the seasonal correlation value is a measure of a correlation between search volumes associated with the plurality of directly forecastable keywords and a seasonal trend in search volume; associating a non-directly forecastable keyword with the plurality of directly forecastable keywords; generating a first forecast of keyword search volume for the non-directly forecastable keyword utilizing a first forecast type when the seasonal correlation value for the plurality of directly forecastable keywords has a value greater than or equal to a predetermined threshold; and generating a second forecast of keyword search volume for the non-directly forecastable keyword utilizing a second forecast type when the seasonal correlation value for the plurality of directly forecastable keywords has value below the predetermined threshold.