Everyone always uses f, df, d, db, b etc (forward, down-forward, down, down-back, back) to describe how to do the moves, but this method is extremely confusing and there is a much better way that me and my friends came up with back in the 90's.
instead of saying d, df, f you would say "quarter circle forward"
instead of saying f, df, d, db, b you would say "half circle back"
if you were doing Iori's special for example (not the upper-cut version) you would say "quarter circle forward, half circle back"
pretty strait forward
It's much easier to communicate the moves this way.
The only kind of move that doesn't really work with this is your uppercut, but instead of coming up with a new way to describe that we just call them uppercuts because they are pretty much the only move that works that way and if not we just say: do an uppercut twice or do an uppercut and then... and so forth.
Even if you're more familiar with the old way, you have to admit that you don't even have to think about it when someone tells you to do a quarter circle forward versus saying d, df, f