Flightaware Pro Stettings Question

I Received 2 Flightaware Pro Sticks in combination with new antennas. Made a huge improvement.
But i habe a question. I changed the Dump Gain Setting from max to about 35
Bat i’m still not able to Interpret the graphs
have i improved?
Gain Change was at 01.08

http://img5.fotos-hochladen.net/uploads/adsbfsp87t5snua1b.jpg