Most future price models that are created in this space, rely heavily on different variables seen in historic and current data. The past isn't always an indication of future results, as the stock market at it's core is pure randomness(basic explanation is everything is priced in, in this omniscient being), however the past(not going to dive into current occuring events in this rant)is all we have to attempt to create an understanding for the market driven on the madness of men(as Issac Newton famously described it). We attempt to create a method that makes sense to us on how things work in this space. However these are purely man-made laws that are subject to revision and change.