Precognition

Precognition is the ability to perceive future events before they actually happen. As knowledge of the future invariably causes that future of change, visions of the future are subject to frequent shifting although sometimes a user will see the future that is destined to happen because of their own interactions with the present.

Alice Cullen (Twilight)
Alice has the power to see into the future. The premonitions she experienced as a human are intensified in her vampire life, and she uses them to her advantage in order to keep her family safe. It mainly works by her focusing on a certain object or person and keeping track of its decisions. She can also focus on several objects at the same time, up to the limit her mind allows. Her power is one of few not affected by Bella's shield. Alice makes extra money by using her power to predict windfall investments in the stock market. As a human, she only received visions at certain times while at most times, she felt the predictions.

The vision shows up after someone's decision, which probably means that her power is working all the time like a system alarm, no matter the distance of the target.

However, Alice's foresight has many limitations: she can only see the outcome of someone's decision once it is made - meaning the future can change all too quickly; and if the decision is not firmly rooted, she can see several possible futures at the same time. Also, her vision can be clouded if someone else's decision is involved. Her greatest limitation is that she cannot see any future that involves Quileute shape-shifters or vampire/human hybrids, even if it could be someone else's decision that she is tracking. This is a mystery that Carlisle has theorized is due to teh nature of the shape-shifters, who, in the split second it takes them to phase, don't technically "exist". Carlisle also believes that there may be a link with the shape-shifters and Renesmee having 24 chromosome pairs. Alice theorized that she cannot see Renesmee and the shape-shifters or anything connected to them because she has no experience as being one of them; she sees vampires best because she is one and can see humans because she used to be one.

Alice's gift makes her greatly prized by the leader of the Volturi, Aro, who wishes for her to join his guard, thinking she would be very useful. Aro wants Edward too, though with less intensity. However, her bond to her family keeps her from joining the Volturi, despite Chelsea's ability to manipulate relationships.