Trend forecasting uses past sales and market data to predict future trends. Marketing experts use trend forecasting to help determine potential future sales growth across many business areas. Trend forecasting quantitatively analyzes time series data plotted on graphs to identify patterns, such as constant, increasing, or decreasing trends over time. Fashion forecasting specifically focuses on predicting upcoming colors, fabrics and styles that will be presented in stores for future seasons across various fashion industry levels and other industries.