I think you would do much better with an outside antenna.
There much easier to aim for the sweet spot.
Global would be the furthest away from you so I would aim for that for the highest signal strength
and tweek from there.
You want a balance of signal strength for all the channels you plan to watch.
If you don’t have a balance of signal strength you will get drop outs.
Interference could be an issue ,take note when you get a signal drop if there is any electric device that just turned on around your house.
I once had a neighbour with an old microwave oven that would interfere with my Satellite signal.
The seal was gone on it and it was leaking microwaves, it took a bit of convincing them that it was bad for there health.
Last edited by Romany; 2019-06-11 at 01:58 AM.
Reason: Updated info