"The Vortex" is another name for Akuma/Gouki's wake-up mixup metagame. While most characters have this as well, Akuma's is special in that he has a staggering amount of options, and most of them are relatively safe. I finished my tutorial for it, available in two separate parts available on my youtube channel.
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Hope you guys enjoy it, now I can finally never think about the vortex again. Except for when I'm actually playing, of course. I have a thread explaining it in detail over at the Akuma SRK boards, so check it out.