max pain

Hi, I'm new to Options. When i tried to learn Options, I came across Option Pain and Option Chain. I couldn't understand how someone can predict the expiry price by reading those two. Can someone tell me how to read Option Pain and Option Chain and how to trade based on them. Thank You.

Hi All, I like to know that How can I calculate Nifty Max Pain in excel from below link :- https://www.nseindia.com/live_market/dynaContent/live_watch/option_chain/optionKeys.jsp?segmentLink=17&instrument=OPTIDX&symbol=NIFTY&date=28JUL2016 any help or guide is very HelpFull for me...