Is there any function which helps in fetching all strike price of a particular day, if not please tell how i can make custom function regarding it.
Is there a way to get strike prices for past expiries.
Ex: I need all INFY Options data for 25-Jan-2023 expiry.
Nope. Because NSE does not provide it at all. But Brokers like Upstox do. If you have account with us opened from https://www.unofficed.com/partners, then let me know. I will ask someone from my team to connect and help you up with sample code and initial auth connection.