Some members of the fighting forces of the Ordo Hereticus exhibit a fanatical desire to get to grips with the enemies of the Emperor, often so much so that their commander is able to exert little or no control over them during a battle. Such models are noted in their army list entry as affected by Holy Rage. Models affected by this rule who are not already engaged in close combat must move at their maximum Movement rate +D6" towards the nearest enemy unit. This extra movement is not affected by difficult terrain. In addition, they must always charge and make a Sweeping Advance if able to do so.
Holy Rage
Source: Codex: Witch Hunters, p. 24