Chapter 4
V.1-3 Telling that the kingdom of His, in the millennium will be all light and perfect order.
V.6-10 Describe the conditions at the time of writing when the remnant, under Zerubbabel had returned to Jerusalem. Zechariah encourages him, that he would be able to complete the job of rebuilding the house of God.
V.11-14 Christ in the future will be both King and Priest, His power shall be the Holy Spirit (the oil). It applies both to the remnant then returning like a shadow of the real fulfillment in the day when the Lord appears (Rev. 11:4).
Chapter 5
V.1-4 Another vision a high-flying roll (about 30 x 15 ft) this pictures judgment which will search into every corner and punish stealing and swearing falsely.
V.5-11 Another vision. The woman held in place by a weight. A picture of the wicked idolatry introduced by Babylon into the land of Israel earlier. It is now departing and returning to its original place. Shinar is in Babylon, where men opposed God (See Gen. 11:2; Rev. 17:5).