Flick

Mojo.Event.flick

Here is how I created a swipe right for next and left for previous.

// Swipe left (next), right (prev)
Mojo.Event.listen($('read_scroller'), Mojo.Event.flick, function(event) {
		// Swipe next
		if (event.velocity.x < 0 && event.velocity.y.abs() < 200) {
			ReadAssistant.prototype.get_chapter('next');
			$('read_spinner').mojo.start();
		}
		// Swipe prev
		if (event.velocity.x > 0 && event.velocity.y.abs() < 200) {
			ReadAssistant.prototype.get_chapter('prev');
			$('read_spinner').mojo.start();
		}
	});

Hope this is helpful.