[qiqitori]

Going a bit off-topic here, but I can't be the only one who doesn't know what these numbers mean... So, what do these numbers mean?

NVidia? Sep 17 2021? $405? (Current price appears to be 220.68)

Also I can't find NVDA anywhere on the page right now. Tried to fiddle with various options without really knowing what I'm doing. Is it gone now?

[rnitchy]

first off set the top left expiration to "ANY" (for ease of use to find results easier), then search the ticker symbol at the bottom right.

Nvidia in your example would be the underlying equity that the options derivative contract is based on

sept 17 2021 is the expiration date of the contract

405 is the strike which is the price at which the contract allows you to buy or sell (depending on if the options contract is a Call or Put contract)