When I was first interested in traveling I checked the prices for coach from Houston to Amsterdam NY. I started with about 6 months out, $128 one way senior fare. When I finally pulled the plug it was $166. I bought my ticket and had my first trip. I'm thinking about doing it again but now the price is $399. And it's 6 months lead time, instead of Amsterdam I'm pricing for Utica NY. That's too much for me.
I started watching fares about five months out, because I read earlier in this thread that five months or so was a sweet spot.
What I actually found was I had to wait till ten days AFTER four months out, and then the fares dropped enough to hit what I considered a sweet spot.
YMMV, depending on the time of year you want to travel. I am looking at mid-January to mid-February, when not many people really want to travel, and low bucket is conceivable. It's not there yet, but I've hit the compromise point between prices and my tolerance for keeping my (and my family's) plans in suspension.