The third seal opened
Rev 6:5 And when he had opened the third seal, I heard the third beast say, Come and see. And I beheld, and lo a black horse; and he that sat on him had a pair of balances in his hand.
Rev 6:6 And I heard a voice in the midst of the four beasts say, A measure of wheat for a penny, and three measures of barley for a penny; and see thou hurt not the oil and the wine.
A black horse, perhaps representing a burned earth, resulting from war and famine. What if a nuclear war came about? There would be many killed and much land destroyed that would have been producing food. Food would be scarce; with war comes famine.
Mat 24:7 For nation shall rise against nation, and kingdom against kingdom: and there shall be famines, and pestilences, and earthquakes, in divers places.
The balances, or scales, in his hand represent the increased cost of food. Every portion carefully measured, and the price was a penny, a Roman denarius, which was much more than our penny. It would cost a days wages to make a meal of bread.
Gen 18:6 And Abraham hastened into the tent unto Sarah, and said, Make ready quickly three measures of fine meal, knead it, and make cakes upon the hearth.
This was a minimum amount of bread, to feed the three visitors. Solomon was a Rich man and he had ten times this each day.
1 Ki 4:22 And Solomon's provision for one day was thirty measures of fine flour, and threescore measures of meal,
Do not harm the oil and wine? This I see two ways. In the natural, these were the finer things, that the rich enjoyed, but on a spiritual level, I see the oil representing the Olive Tree which is Israel.
Rom 11:16 For if the firstfruit be holy, the lump is also holy: and if the root be holy, so are the branches.
Rom 11:17 And if some of the branches be broken off, and thou, being a wild olive tree, wert grafted in among them, and with them partakest of the root and fatness of the olive tree;
Rom 11:18 Boast not against the branches. But if thou boast, thou bearest not the root, but the root thee.
The wine represents those of the vine, those who are covered by the blood of theLamb. Do not harm the chosen of God, the redeemed of Israel. This being a command from heaven; but satan does not obey God. These things must happen before the coming of the Lord.