Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Online tools for monitoring my portfolio gains/losses in real time?
This functionality is widely available, not only on brokerage sites, but also financial management and even financial information sites.  For instance, two of the latter are Google Finance and Yahoo Finance.  If you are logged in, they let you create "portfolios" listing your stocks and, optionally, the size of your holdings in that stock (which you don't need if you are just "watching" a stock).  Then you can visit the site at any time and see the current valuations.