Perth Premium 98 price cycle

Over the last 12 completed cycles (since 13 Jul 2026), a Perth cycle lasted a median of 7 days. Prices rose a median 14.2 c/L from a low to the next high, over about 1 days. They then eased about 12.1 c/L before the next jump. No two cycles are the same length, so read the dated chart rather than a weekday rule.

P98 averaged 254.7 c/L on 30 Oct. That is 4.1 c/L below the 29 Oct high (1 days earlier). It is 8.0 c/L above the 28 Oct low. The last turn was a high, so prices are on the easing side of the cycle.

They are already easing: the last high was 1 days ago. In past Perth cycles prices kept easing for a median of about 6 days after a high before the next jump. Past cycles are a guide, not a promise: the forecast page gives the day-by-day estimate and how often it was right.

In the big capitals, retailers raise prices sharply over a day or two, then let them ease over the following weeks. The pattern comes from retail pricing, not from wholesale costs.