There are factors that, according to how and how the conditions determine prices are always the intersection of the supply and demand curve. Supply and demand in the market can have two types of collisions. A – temporary or current collision that determines prices temporarily. Permanent or constant collisions that stabilize prices. The supply and demand to determine prices in the market and influence them may arise three conditions: 1) the increase in the supply that will reduce the market and fall prices. Increasing demand that promotes market warmth and rising prices and the black market. 3.The supply and demand balance that is stable in this state and if the market feels that prices will be balanced and fair. About the effects of supply and demand in the anonymous economy trading market, the following statement states: “Even from the world of construction economics we can learn two words to “prove and demand.”.