Help in fitting

I need to fit a smooth curve to my histogram (or graph). I have attached both.
Will you be able to help me?
Thank you
TotEVsXYZGraph.C (808 Bytes)
TotEVsXYZ.C (4.1 KB)

You forgot to attach the data file for the histogram.
Do you simply want to smooth your curve or do you want to fit a defined function?
For example, you can smooth the graph by using teh Draw option “ACP” instead of "ALP"
I suggest to read the various tutorials about Fitting, eg FittingDemo.C