Metastock is too much of a tank!
You can set up scans here ...
http://www.stockscan.com.au/
but it is still end of day data. Yuk!
You can do pretty good live scans on WebIress by using the market map tool to display your watch lists. On the % setting breakouts appear as big bright green boxes. Then just drag the stock onto a chart window to see it happening live! Cool!
