Hello. I'm looking for a decent forecasting software, or at the very least some direction in say Excel? Maybe a template that is better than the stock charting and graphing stuff?

Basically what I need to do is take about 18 months of data and plot booked orders vs. forecast ones over each of those 18 months. Ideally I would like to see the raw numbers listed in the graphs, and other data like, average monthly bookings, etc. I've collected a lot of data about our sales over the last 18 months and would like to use that information to determine some metric or trends for future forecasting.

Anyone have any thoughts? Thanks.