queue tree question

Can I use queue tree on router which had only one lan card?

yes. HTB are unidirectional . No problem.

Regards

I am trying to capture only upload packets and only downloads packet and I am unsuccsessful.
I follow this diagram:
http://www.mikrotik.com/testdocs/ros/2.9/ip/flow.php

I try in mangle to put chain input and source address of my local ip but this didn’t work.

Any advise?