this specific Moving Average Divergence Convergence Seasons Indicator is made by Dr Ken Long Tortoise Capital brings a unique way of the flow of the market, the 4 seasons are used to describe the areas of the MACD so for example when the area is below zero and hasn't crossed the EMA 5 we call that winter which is very bear bias, once you get support in winter and crosses above the EMA 5 we call that fall which is the first indication of support for price and some weakness toward the downside. if the MACD is above the zero line we call that summer which is a very bull bias valued area, and once it crosses below the EMA 5 then that's where we call fall mode showing us weakness and very slight indication of a possible reversal. the MACD can be both used for swing trade and day trading, it provides a unique insight to the markets showing the layers of a trend using seasons.