Symbol: The New Testament in “The Revelation of John” speaks of four riders: the rider on a white horse is the symbol of Christ himself; the rider on a fiery-red horse represents war, the rider on a black horse with a scale in his hand means hunger; and the rider on a greenish horse symbolizes pestilence.
Vision: Seeing a rider on a horse: your prestige is growing and your climb up the career ladder is going well. Riding a horse in full gallop: you are chasing a questionable goal and need to be more realistic. It young girls see a rider on a horse: a love affair is in the making.
Depth Psychology: See Horse, Horseback Riding, Riding.... Dreamers Dictionary
Dreaming of a rider predicts you will receive unexpected news or gifts soon.
If it is a woman who dreams of the rider, she will have family problems from wanting to marry a man of a lower social status. Seeing a rider fall from the horse is a sign of failure in business and major economic losses. When the rider is the dreamer himself, he will see improvement in emotional and familial relationship as well as in his work.... The Big Dictionary of Dreams