Dodge (XCOM2)

Dodge is a new mechanic introduced in XCOM 2, it gives a chance to recieve a "grazed" shot taking only a portion of the damage. Unlike Aim or Will there is no natural way to increase Dodge, you will have to wear a Spider or Wraith suit or equip a Personal Combat Sim.

Considerations about Dodge

Vipers, Codex, Archons and Elite Lancers come with a Dodge chance, you should take that into acount when planing your strategies, specially if you plan to melee said enemies.

Explosives, psionics and other AoE attacks are not affected by Dodge, someitimes a Soul Fire or Combat protocol might be your best choice.