please share your ideas,, i am from india but it will be useful for our derivative market too ,,
i haven't gone thru your links but as far as i know, GEX is calculated using OI but recently i saw a site where they were calculate it on Time and Sales data.
it is freely available on TG bro,,,
here it is ,, https://t.me/BFXSMCCOURSE/3689
Note: it is not mine found it on internet, credit goes to original uploader
@gadfly please upload it (you shared yesterday & you are going to share) to other hosting site. i am not able to download from medi*fire.com neither directly nor using VPN.