The autolink angle is a special knockback angle programmed into certain attacks in Super Smash Bros. Brawl and Super Smash Bros. for Nintendo 3DS and Wii U. While it reads in the game data as an angle of 365, 366, or 367 degrees, the game treats it rather differently - instead, targets are sent in whatever direction the attacker is moving.
The angle does not exist in Super Smash Bros. or Super Smash Bros. Melee; attacks with the angle in Brawl have fixed angles in the other two games.