ATM or OTM options pricing

Hi sir, How options price will be valued when ATM/OTM options becomes ITM option in two scenarios.

  1. Within 5 days of expiry
  2. Within 15 days of expiry.
    Thank you
    Maheswaran.

Depends on option greeks, can check sensibull for detailed analysis.
https://web.sensibull.com/home