The channels in green are all very strong and are LOS= Line of sight -->Strong . The channels in yellow are a little less strong then the ones in green. I suggest a SIMPLE Indoor NON Amplified Tv Antenna for Digital Tv Reception , one of these ,
http://forum.tvfool.com/showthread.php?t=233 . Read and understand this about Real Digital Tv Channels , Virtual Digital Tv Channels , Analog Tv Channels ,
http://forum.tvfool.com/showthread.php?t=695 , Here is how to point Tv antennas ,
http://www.kyes.com/antenna/pointing/pointing.html . . Set the Digital Tv to scan for Digital Broadcast Television Channels , Not cable channels.