Guard Cancel Rolling
At the expense of one super meter stock, you can choose to cancel your guard into a roll by pressing 
+ 
. Unlike normal rolls, this roll is completely invincible to attacks and throws from the very start to the very end. This technique is much safer than a Guard Cancel Blowback, as it cannot be countered at all. Your opponent is also halted for a bit while its being performed. Even if your opponent anticipates it, the best he or she can do is set up a meaty attack as soon as you recover from the roll.
By default, you roll backwards, but if you hold forward while performing a Guard Cancel Roll, you roll forward.
Strategy Corner
If you anticipate that your opponent is going to 
an attack into a slow move, you can decide to Guard Cancel Roll the attack, and you will recover from the roll while your opponent is still in the animation of a move. This can potentially leave your opponent extremely vulnerable to punishment.