It is imperative to be logged in to vote on the site. Then click on one of the arrows on each deal, the + red representing a positive vote and the – blue a negative vote.
Moreover, a vote can not be changed once it has been issued.
Accompanying your vote with an explanatory comment is always beneficial and useful for the whole community, we strongly encourage you to do so;).
Finally, as stated in our general conditions of use, abuses related to this system are not tolerated and will be punished.