My current antenna is not working very well

So I am looking at getting better one, currently I have a $10 one from Wal-Mart.
http://www.tvfool.com/?option=com_wr...5b94ad3d7e437e I hope the link works.
Some details:
I live on the second floor of my apartment building.
Cannot put antenna on porch or roof.
TV is not near a window.
Would really like to plug in the antenna and not have to move it when I watch another channel or it rains/windy.
Thanks!!
Jennifer