Oil prices retested the resistance area, the upper boundary of which is in the zone of $65 mark, and about which we wrote earlier. After the retest, the market is developing a downward movement. Additional pressure on the quotes may be associated with an unexpected increase in oil reserves in the U.S. Political factors also affect the mood of traders: the upcoming negotiations between the U.S. and Iran have softened the situation. Iran, as the third largest oil producer in OPEC, plays a key role in global supplies, and any conflicts could lead to supply disruptions and price increases.