Retrograde Planet
Retrograde motion is apparent movement opposite the usual direction against the celestial background, seen from Earth. It does not mean a planet reverses its orbit around the Sun.
How it is defined
It depends on relative motions and viewpoint. Stations mark changes in apparent direction; durations differ between planets.
How to read it
To check the phenomenon, distinguish the calculated position, its reference time and what an observer can see from their location. These related details answer different questions.
A concrete example
Plot successive positions in the same reference frame before interpreting the loop. A symbolic description of review does not establish delays or failures in your life.
Explore further
Explore the sources and related concepts. When consulting tables or calendars, look for the date, coordinates and reference frame they use.