Nifty 24 Sep 2015 - Expiry Chart

• At the open, 7900 Calls added huge OI. After the initial down move, Puts (7800, 7750) added huge OI. 
• 7800 support increased to 60L+. 7850 initially was resistance, but later, it became support.
• Except 7900 PE and 7850CE, all other strikes added huge OI.