I can not say how many Digital Tv stations/channels will be received.
A better antenna to use is the Antennas Direct , Clear Stream 2 Complete UHF/VHF antenna with a Antennas Direct CPA-19 preamp.
http://www.antennasdirect.com/store/...VHF-Combo.html.
http://www.antennasdirect.com
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Most likely , up high will provide the best reception , test locations for best reception.
The best way to get the coax from the balcony to in side the apartment is a hole through the wall.
Here is an other way to do it. Flat Coax , Eagle Aspen FC-300LX ,
http://www.solidsignal.com.
As always , trees and tree leaves do a real fine job of reducing or blocking Tv reception and so do buildings and other obstructions.
It is best to locate the antenna at a location that has the least amount to no amount of obstructions in the direction of reception.
The Tv/s Must Channel Scan for the Digital Broadcast Tv stations/channels , sometimes named the 'Air Channels' or 'Antenna Channels' in the Tv setup menu because the Tv transmissions travel through the air from the transmitting antenna to the receiving antenna.
DO NOT channel scan for cable tv channels.