It sounds like you have a difficult orientation with a southwestern exposure. Strong HD signals are available from Buffalo and somewhat weaker signals from Stoney Creek mountain which would be south east of you. Weaker HD signals are available from Toronto which would be east of you.
You don't necessarily need to point directly at these signals but parts of your antenna must have some line of sight to these signals.

I do quite well from Hamilton mountain but I have clear line of sight and boom antenna with a rotor.

I know some of the folks here in urban areas have some success with indoor antennas placed out on balconies picking up signals as they deflect off of building etc.

Daniel probably has some more insight into this as I believe he has or is using an indoor setup.

Read some of the previous threads in the Toronto Buffalo OTHD reception forum as some of the members describe their antenna setup as well provide some helpful links.