Use the HIGHESTHIGH() and LOWESTLOW() functions to scan for new highs and lows, for example over the last 52 weeks:
HIGH() > HIGHESTHIGH(BARS=52, BACKTYPE=Weeks)
For new closing highs nest CLOSE() in the highest high function:
CLOSE() > HIGHESTHIGH(CLOSE(), BACKTYPE=Weeks, BARS=52)
Similar for lowest lows, this time over 13 weeks:
LOW() < LOWESTLOW(BACKTYPE=Weeks, BARS=13)
Closing lows:
CLOSE() < LOWESTLOW(CLOSE(),BACKTYPE=Weeks, BARS=13)
All-Time Closing Highs:
CLOSE() >= HIGHESTHIGH(CLOSE(),RANGE=All Time)
Indicator Highs and Lows
You can also scan for highest values of any indicator, such as RSI(14) over 13 weeks:
RSI(BARS=14) > HIGHESTHIGH(RSI(BARS=14), BACKTYPE=Weeks, BARS=13)
Highest volume over the last month:
VOL() > HIGHESTHIGH(VOL(), BACKTYPE=Months, BARS=1)
Linking results to a watchlist
If running a scan click on Export Results > Open Results As a watchlist and add columns, charts etc. That watchlist is now linked to the scan, so when the workbook is next opened the scan is run automatically and the list is updated with the latest results.