I've been using that website a lot, and the Android apps I've been using appear to use the same techniques, and even draw a line. My problem is that despite this, signal quality is still 0-1%, making me think my azimuth is off. Since my dish doesn't have something that shows me azimuth, I've been guessing, based on what I see on my Android compass (which works terribly as I get closer to the metallic dish). And yep, I know the difference between true and magnetic south. The mount on my roof is perfectly plumb, which was to my surprise, as it was my first pole mounting ever...so that can't be it.
So your opinion is that a signal strength meter shouldn't be needed and I should just keep trying? (which I'm fine with, I'm here asking all of your honest opinions, after all!!)