Unless you think that sign is magic, we aren't looking at the end of the world.
Those signs are updated a few times a day, by humans Increases are urgent, declines are meh..
Gasoline is unusual, politically, but can serve as a good example for other goods that are less regulated. In the US, we have PADDs, and 99% of the time, what you pay for fuel in your car is the spot cost of gas, +/- the PADD premium or discount (PADD 4 is almost always the highest), +/- the local refinery efficiency (thank you Pine Bend), and the delivery cost (usually not more than a couple of cents per gallon).