Right I see, so illiquid small cap options will move based on...

Right I see, so illiquid small cap options will move based on general sentiment moreso than what the actual value of the options would be calculated at. So using the Black Scholes model is somewhat unnecessary for 3DAO. Still, it would be good to use so can atleast see whether am buying or selling at terrible value and for the longer term it would be great to use

I've tried doing a few calculations to practice using the Black-Scholes calculator but I'm having difficulty working out the volatility value. I can't work out the standard deviation calculation (I now understand where it derives from but learning the calculation itself is for another day), is there any website that can provide a volatility value for each asx stock? A bit of a google search hasn't found anything...