The streaming scanners start broadcasting each morning @ 9am EST.  Below is the schedule:

9:00am - 9:30am Pre-Market Movers
9:30am - 4:00pm Momo Scanner, 5% Scanner, and OTC Scanner
4:00pm - 5:00pm Post-Market Movers

I normally turn the scanners off around 5:00pm and post the next days watch list.  If there is a need to be streamed longer, then I may extend that time period out.

There are 4 sets of columns for the scanners they are as such:

1st Column: Which scanner triggered the alert
2nd Column: Type of alert
3rd Column: Description of the alert
4th Column: Symbol alerted

Pre-Market Scanners (Scan Time: 9:00am - 9:30am)
Color: Red or Green
     Price Range: $0 - $15

Market Hour Scanners (Scan Time: 9:30am - 4:00pm)

Momo Scanner
Color: Brown
Price Range: $0 - $15
Description:  This scanner alerts when certain criteria are meet for a momentum runner.  Sometimes you will miss the initial push due to how fast it alerts.  You then track for a pullback and possible retest of the previous high, for an entry.

5% Scanner
Color: Grey
Price Range: $0 - $5
Description:  This scanner is designed to alert when a security has the potential to pay at least 5% ROI on its alert.

OTC Scanner
Color: Cyan
Price Range: $0.0001 - $.02
Description:  This scanner is designed with the same criteria as the 5% scanner, but only for OTC markets.  Since these are lower priced underlying securities you can not use a 5% measure.  So you look to take profits after it alerts 5 times on the scanner. 

Post-Market Scanners (Scan Time: 4:00pm - 5:00pm)
Color: Red or Green
     Price Range: $0 - $15