Assuming the answer to this question is still relevant, here is my answer: In Stockalyze (https://stockalyze.com) you can create watchlist (and also portfolio if you like) that can give you overview of gains and losses of all the stocks in watchlist. Stockalyze is free to use for large part of it's functionality (and that includes watchlist too) so you can give it a try. Regards, Sacha
