A forecasting engine arranged to generate a forecast for a set of historic time-series data. The present invention also relates to a cosmetic composition comprising the oil-in-water type nano-emulsion composition, and to a method for preparing the oil-in-water type nano-emulsion composition. Systems and methods are provided for coordinating the different relationships to provide relationship-based pricing. An end time of the tone in the signal may be determined by locating a last frame in the series of frames.