Someone wrote:
"Instantaneous standing wave current moves."

Current is movement. Standing waves stand still.

Forward (incident) waves move forward. Reverse (reflected) waves move
rearward. Interference between incident and reflected waves makes a
stationary current pattern. It also makes a stationary voltage pattern
(VSWR). Voltage and current standing wave patterns are displaced by
90-degrees.

In dealing with a-c (r-f) it is usually convenient to use effective
(rms) values because instantaneous values change from instant to
instant. The peak instantaneous value is simply: (sq.rt.2)(vrms).

Instantaneous currents move in the same directions and have peak
amplitudes in all locations which are related by 1.414 (sq.rt.2) to the
rms values.

Best regardfs, Richard Harrison, KB5WZI