Zechariah 1:8

Zechariah 1:8 I saw during the night, and behold, a man was riding upon a red horse; and He was standing among the myrtle trees that were in the bottoms; and behind Him there were red, reddish-brown, and white horses.

This Man is Christ in His humanity. The Man in this vision is riding on a red horse (Zech. 1:8a). In Revelation 6 the red horse signifies war, which always involves bloodshed, but here the red horse signifies Christ's swift move in His redemption by the shedding of His blood.

These myrtle trees signify the humiliated people of Israel in their captivity.

As Christ was riding on a red horse, He was standing among the myrtle trees that were in the bottoms of the valley. This means that He remained strongly among the captured Israel in the lowest part of the valley in their humiliation. Captured Israel was in the lowest part of the valley, and Christ was ready to do anything for them swiftly. Christ, the One on the red horse, was their patron taking care of them in their captivity.