What methods are there to track incoming blocks of calls on GME so that we know when RK begins to purchase his next army of calls?

I don't have access to the premium version of unusual whales like in Biggie's video. Is there an easily accessible way to keep an eye out for incoming gme call blocks?

I use IBKR but am not well versed enough with the dashboard version to see whether or not it has that level of data. I'd rather not pay $40 per month for the privilege, but nobody has any better ideas I likely will :)

I'm ready to start adding fuel to this fire.