How can I see my opportunities in real time ?

How can I see my opportunities in real time ?

Hi all,
 
I have a quick question regarding the graphs.
 
I would like to create a graph that shows my projections of my portfolio for the coming year :
I want the total amount of all my opportunities on the vertical axis, and the time on the horizontal axis, so I can see the projection month by month.
 
How could I do so ?
 
Thank you
 
Florent Saliou