A "live" snapshot of the symbol you are looking at. This widget comes in 3 flavors: short (just ticker, last price, and change), nochart (all daily data but no chart), and full (all data + a live chart). Very useful to financial bloggers.
Updates are accomplished in a live way -- the user will see changes every time… (more) an update request is sent. The updates stop after market is closed, so to see how this thing would behave, please check out: http://www.sanebull.com/test.html
Note: all 3 types have different sizes, so adjust accordingly! (less)