Cheers, Beyonder,
I thought of this. The trouble is, the two scans I want are opposite sides of each other. For example, if I was scanning for stocks whose low for the past ten bars has been above a 10ma, I would also want to scan for stocks whose high for the past 10 days has been below a 10ma. This should return both rising and falling stocks over that time frame.
The Prorealtime scanner is pretty easy to use so I thought I might be able to write something like this using some kind of qualifier like 'OR'; but it doesn't seem possible.