My cousin just purchased the C5 and could use help to determine which angle to point the antenna to maximize the channels. You guys helped me tremendously when I set mine up.
Take a look at the manufacturers documentation and you see that at VHF frequencies the antenna is rather directional. However, it's far less directional at UHF frequencies.
I would start with an aim point of about 220° then check left and right of there in small steps. You'll be looking for the best compromise.