Compared to what stations are available in the area, and what others in the area can receive OTA. Antennapoint will show what stations that should be available. If it will receive anything at all it is working, how well is another question.
Depending on location, I am sure there are lots of areas in Colorado that have no OTA at all, but in somewhere like Denver for instance, there should be several. Where we are, there are only three available, but the strongest will come in on a coathanger.
Personally, I use a Sensar IV with the added Sensar Pro meter, and can usually get any stations up to about 50 miles.
