bitcoin difficulty prediction

[ridertiger]

The way I see it, some miners move away from BTC to BCC as difficulty increases, and then come back again. It would be nice if there was a way to predict the difficulty increases in bitcoin. I am sorry if it is written down somewhere but it seems to be a people's choice as opposed to something planned ahead of time. It would be very useful if someone would provide some information on this.
I could write a model or come up with a simple quadratic equation for prediction of the future continuation but a machine learning algorithm would be better.
Any ideas?