Uni-directional antennas need to be rotated to POINT in the general direction of the transmitting tower. If all of your stations are spread out, then you need an omni-directional antenna, or a rotor you can control via a remote.
If you live in a valley where the signal has go up then down to you then that''s not going to work, all you get are weak signal reflections, in that case you have no choice but paying for cable service, or go Satellite, or Internet-TV, if available.