I'm trying to build a model for the ticket sales for different sporting events over a period of 30 days before the game to the day of the game. The problem that I'm having is that I can't seem to fit the right model to it. I've tried negative binomial, linear, poisson, but nothing seems to fit right. A problem that tends to occur is I get a residual plot that looks like the one below. Does anybody have any suggestions for things that I can try?
Residuals for the negative binomial: