Alternative:
If you do not like to take Tung Chung Line, you may use this route to go to North Point Station:
1. Nam Cheong to East TST (by West Rail Line) -> exit at East TST Station ($5.40)
2. Walk to TST Station within 30 minutes
3. Re-entry at TST Station
4. Take Tsuen Wan Line to Admiralty
5. Transfer to Island Line to North Point
6. Exit at North Point Station (A1) (Pay difference: $6.10)
7. Total: Use Octopus to pay $11.50
Source: MTR web page or Fare chart printed by MTR
I encourage you to take MTR on Feb 20 (Sunday) because the traffic situation may be mess, and there may be traffic jam occurred.