Can anybody, and preferably a pilot, comment on the practical use of an AoA indicator ? How would you "fly" it ?
The ones I've flown, you "fly the needle," or lights, or indicator bar. In other words, If the needle/bar is slowly heading upward on the panel instrument, deeper into the yellow band and toward the dreaded red at the top, you "push it down"--add power and maybe a bit of forward stick. The display is typically either vertical or half-round, like a VSI though usually reversed--pointing to starboard rather than port.
Conversely, if you want to slow to approach speed, you bring the needle/bar up out of green by reducing power and adding a bit of back stick or trim, then watch the needle/bar rise into the yellow band as you "pull it up."
AoAs are remarkable instruments, and I've always been amazed that they aren't more broadly used.