It would be nice if BR gives us an idea as to the number of seats remaining at the price point we would like to buy, but honestly, my experience with BR is if you see an attractive fare, grab it.
We just bought 2 round-trip tickets; they were $3200 EACH. I had tracked the price for a month, no budge, so sigh, we bought it.
Went back and made a dummy booking for the identical itinerary, and it had jumped to $4600. Whew!