Auto updating stock quotes Adult web browser
There are a number of financial websites like Yahoo Finance, Forbes etc that you can view to monitor stock prices.
The happy news is that you can even use Microsoft Excel to monitor the performance of your investments. Click the cell A1 and go to Data (in the main menu) -- From Web (from the Get External Data group).
This will continue to refresh even when your Google Sheet is closed.
Fixed Bugs - Ticker program remembers how large you made the index area and restores it when you start the ticker again.
This isn't particularly helpful so we've written a script that you can adapt to update the market data every minute, even when the Google Sheet is closed.