I'd need a program able to take data and plot a trend graph, and it should be able to continue it to see the future trend. I've found some commercial programs but none work. Is there a free one? I once saw some graphs with grey background and blue dots. What's the program that makes those?
You can use Excel for that - check this tutorial: http://spreadsheets.about.com/od/spreadsheetlessons/qt/Fibonacci_Numbe.htm