Through Zechariah 1:7-11 we have recorded the vision of the horseman among the myrtles.
In Zechariah 1:8 and comparing with Zechariah 1:11, Zechariah notices a man riding (missing word) reveals that it is MALAKH YEHOVAH, translated ‘The Angel of Jehovah’ or ‘The Angel of His Face’. Whatever the actual translation, it is meant to convey the idea of the visible manifestation of God, the Son (Genesis 18:1-3). He was riding in the Myrtle, not the proud cedar or the spreading oak, these which symbolise world powers, but the myrtle, symbolic of Israel and divine generosity. These (myrtle trees) are hidden away in the ravine, referring to the position of Israel as a being in a world empire almost lost from sight.
The many horsemen depict the many servants of Jehovah, and their different coloured horses relate to the truth, that from all places and nations throughout the whole earth they have come to report to Jehovah.
Here is the graphic picture of the messengers of God, having departed and travelled throughout the whole world and seen the gentile nations at ease and Israel greatly troubled, return and give their report to The Lord who is displeased. So God acts and in this vision he shows that despite being small, in captivity and having problems, that God is still actively interested in their welfare. He is going to visit them and give them prosperity: from his heart shall flow all his divine goodness to them. Therefore those in Jerusalem should put away fear and be comforted by the Lord.