You can use a polynomial trend line or as I said before I would make up data for FY2013 and just make it a dotted line to show it is predicted. At the moment you've placed 2011 and 2012 together. To get a graph progressing forwards flatten out the data. So something like Jan - 11 ..... Oct 11 .... Jan 12.... Sept 12 ... Jan 13 along the x axis.


Trend.xlsx