Options calculator


I am using options calculator in nest trader ,i have some doubts ,please clarify them ,and please do answer the following

  1. For Nifty options and Cds oprions should i select underlying or futures in options calculator

2.For nifty and currency options what should i enter in dividends and exdate

if so where can i find the above data.

Please help me

  1. For option calculator always use the underlying, be it NIFTY or Currency

  2. Dividend value can left as NULL or entered as zero for Nifty and Currency.