You might have to turn your antenna to the stations direction. see antennaweb.org for good information
antennaweb You should be able to get many stations with an indoor antenna. Also old TVs with a new converter work just fine off the air with a UHF antenna.
If you really want to go cheap, there is a youtube video out there that shows you how to build your own HD antenna. I did it and it works great. The materials required are a little copper wire, screws, a 1x6 or 2x6 mounting board and an ohm converter. Thats it! Not the prettiest thing in the world but it works.