What if for now if you create a tracker that it will give out alerts at the end of the day only with closing pricing numbers.
For value investors live update does not mean anything anyways. if the price target is hit, usually it does not bounce back immediately unless ofcourse it is some kind of flash crash. You can also give a choice so if price reaches with +- 5% it will give a notification.
When you get lot of growth then you can always change the system to real time updates :)
Customer support service by UserEcho