OTA signals are terrestrial and "line of sight" LOS, meaning they are directional to the transmitter. TVFool.com will tell you what direction to point your antenna. My antenna, here in North Scarborough, is pointed at 158 degrees, a little off from the recommended 164 degrees due to my neighbour's large tree. The higher you can get the antenna, clear of buildings and trees (such as my neighbour's mighty pine), the more TV stations you will receive. The station will be received and you can watch, or you'll get a blank screen.
There is the situation where a TV signal can be bounced off a building or neighbor's window into your antenna, so some experimentation is required. Outdoor is better than indoor, higher up is better than near the ground. I don't think any indoor TV antenna will be substantially better than another. A larger outdoor antenna, high up, with a clear LOS view of The CN Tower and Buffalo and surrounding US cities, will get you the most TV stations.