Hillbilly Timing Tape Video Tutorial

I’ve watched this video a few times and it’s starting to make sense.

Is it correct to say on the scale:
BTC= advancing the timing
And
ATC= retarding the timing

for some reason if the above is correct (and I think it is) I was correlating it backwards.

Also, Rob was nice enough to give me the part number for a snap on distributor wrench which is Snap On S9467B. There’s some older ones available on eBay