HotScans will show you the biggest movers in the last 5 minutes. You can't specify $ change, but you can do it with % change. It also does gaps,...
You definately do not need RealTick to get HotScans or MarketGauge, but if you are a RealTick user you get a version of MarketGauge for free....
The problem with the link wa a period at the end. Here is the home page for HotScans and MarketGauge: http://www.marketgauge.com
Separate names with a comma.