Sup man. Glad you’re finding the thread useful.
Double tap is when I brush a button with my MIDDLE finger first, then my INDEX finger. Just watch any Japanese player and you’ll see how useful this technique can be. The first thing you can use this for is whenever you want to go for a throw or a tech hit. A lot of people mash… I hate mashing. I’d play MvC2 or something instead if I actually enjoyed it. When using Chun-li, double tapping becomes extremely useful as well. Messing up d.LP, d.MP is so easy no matter where you’re playing. I use double tapping as personal preference to help my timing greatly.
The main thing you need to remember once you start double tapping a lot more is to NOT abuse it all over the place. Like with Sagat. You should never have to double tap with him at all. The only instance I can think of is when you want to go for a throw or you want to do s.LP, d.MK link. Other than those two instances, you’re always better off just pressing a button regularly.
If you’re playing Guile or Akuma or somebody though, then yeah, double-tapping is a must. How else are you going to get easy RC jab sonic booms and instant Raging Demons?
Good luck. And thanks again for the compliments.