So, being trying to get my head around this.
I understand this https://pokemongohub.net/gym-raid-update/technical-machines-tms/
Fast TM = Teaches your Pokémon a new random Fast Move
Charged TM = Teaches your Pokémon a new random Charged Move
What I'm trying to work out is how these impact the ratings of your Pokemon when you usng an external IV checker e.g.
Dragonite 60 CD
Vaporeon 80 AB
I think the letters they use are a comination of the Quick and Charge moves. E.g. if I rerolled the Dragonite quick move, I might get something better and have say Dragonite 60 BC as the change impacts both attack and defence. I think this is right, am I right?