Your TV Fool report is only resolved to the block level. It might or might not be accurate.
Produce another report following the directions at
http://forum.tvfool.com/showthread.php?t=14508 - it could provide a more accurate prediction in case you are in a hole or on top of a hill.
As ADTech noted, attics are not usually antenna friendly. Try this test. Take the antenna from the attic and place it outside in the yard. Connect it to one television with a fresh length of coax. Aim it at about 108 degrees using a real compass (trying for the same LOS as you'd get from the roof - that is not 'looking' through the house or the neighbor's house). Scan and make a list of the stations you get. Repeat at 290 degrees. Post the list.
I am not familiar with the antenna you are using. If this were my signal, I'd use an Antennas Direct DB-8e with one panel aimed at 108 degrees and the other at 290 degrees for UHF signals from both directions. Then I'd add an AntennaCraft Y10713 aimed at about 290 degrees (towards the weakest VHF station - you'd likely get the ones at 106 degrees (PBS-11) off the back. With such a set up you'd probably get most of the signals in green and yellow.
But the experts will weigh in with your question.