I like using my touchpad/trackpad to scroll by emulating pushing the page like a touch screen phone or tablet rather than copying the action of a wheel mouse. This is often referred to as natural, reverse or inverted scrolling.
When trackpad scrolling used to emulate button presses like the fixed positions of a mouse's scroll wheel, a trick of inverting mouse buttons 6 and 7 could be used.
Now that we have smooth scrolling support for our touchpad drivers, desktops (like Gnome) and applications, we can scroll in relation to how we move our fingers rather than snapping at intervals.
This caused the old method to break, but now we have a much better method. I won't repeat the process but you can read how to set it up at Andy C.'s Blog.