premarket and postmarket information

Can anyone tell me good sources of information for what stocks are being traded actively any given day in the premarket and postmarket? For example tonight IGEN gapped up 6 points, then traded up 5 more points in the postmarket on news of winning a lawsuit. I happened to hear it on CNBC and caught part of the move, but I would like to have a web based service or something offering up to the minute information on stocks that are moving pre and post market.
 
jonper

if you just want a list of most active on the nasdaq, you can get that on www.nasdaq.com
but its a little delayed...you can also check the island most actives on www.island.com
other than those 2, i just keep an eye on the news and then check the stocks
Peace:cool:
Uptick2000
 
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