SEC,
I think the reason a lot of people don't like trends/stats are because they're so broad and self-serving but believe me, I would have been much more encouraged by baseballguy's original post had it anything to do with stats or trends as opposed to, "No way does Indiana win tonight. They have two banged up players, and are playing horribly". Your logic is less subjective if no less faulty. Let's look at the stat of -5 or more favs being 145-36 SU at home in the playoffs. On it's face, along the lines of what WinkyD said, it means you win 3 of 4 times, 75 percent which means your one loss swallows up most of your payout. More importantly is the -5 OR MORE part. I gotta believe if you broke this stat down further, the record of teams favored by, say, -8.5 have a better record in the same situation than the -5 favs, yet your stat lumps them together.
I can see maybe using a trend to support what I think about a game I already like, but usually they're nothing to base a play on.