Well no, not in a 27 year chart. Seasonal changes are hard to spot. But why, if the oil companies control prices, would there be such a long trough in this chart? Why didn’t they just keep it going up?
If a Memorial day surge in gas prices happens every year, it should be easy to spot.
It it's hard to spot, it's probably because it doesn't exist.
Gas prices are set in the commodities futures market. Anybody who thinks the petroleum companies are gouging is free to participate in the plunder by buying or selling petroleum futures.
Hillary turned $1000 into $100,000 in ten months in the cattle futures market, after all.