The graph shows the CME federal funds future expiring october 2015. This shows the market expects no rate hike this meeting.
You can also look up the implied probability on the CME groups website, just google cme fed watch
if you want to see another month: look up name of future contract on cme website, e.g. december is called FFZ2015
Source: https://www.youtube.com/watch?v=780Qawc3fAE (at minute 20)