Re: stall warner at high speed during aeros?
Tiger - With an aircraft pointing and travelling straight up, or 90 degrees to the horizon, the angle of attack will be zero as the angle between the chord of the wing and the direction of flow is zero.
If a fast jet flies along the crowdline at an airshow, level with the ground, but pointing 15 degrees up, then the angle to the horizon and the angle of attack are the same (give or take).
As you can see, the relationship varies and Gheghis's advice above is very good, consider them as different.
However, most aircraft wings are fixed at a certain incidence (angle) to the fuselage, so that when the fuselage is flying level the wing will have a positive angle of attack and generate some lift. In that case, my examples above will not be quite right. The second one for instance may have an angle to the horizon of 15 degrees, but an angle of attack of 17 degrees, if the wing is fixed at 2 degrees to the fuselage.