The xpWave deformation is shown by the blue plane and the direction of travel by the arrow.
xpWave Object tab menu.
Sets the speed of movement of the waves (in cm/s), in the direction shown by the arrow in the solver.
The left-hand example is set at the default Speed of 100cm, in this animation. The right is increased to a Speed value of 200cm.
The strength of the wave, which is directly related to the wave height.
The Strength value is 10cm, on the left, and 30cm, on the right.
Clicking on the arrow to the left of the Strength parameter, reveals the Falloff curve.