Omnibus Price History, explained

Add the Omnibus lowest price block to your product template in the theme editor (and the collection embed if you want the line on product cards too). The overview tells you when the line is live, flags promotions to check, and explains what happens for products with less than 30 days of history — the line shows the lowest price since recording began, with its date, and becomes a full 30-day value automatically.

When a product goes on sale (compare-at price above the selling price), the block shows the reference under the price: the lowest price of the 30 days before the sale started, with its date. It only appears during promotions, follows the selected variant, and is rendered by your theme with zero network calls — it doesn't slow your pages down. Font, size and wording are adjustable in the theme editor.

The Prices page lists what is on sale: price, compare-at, since when, the computed Omnibus reference and the window it comes from. A red badge warns when the sale price is above the reference — information only, nothing is changed in your store; review the sale price or the compare-at and decide.

One line per promotion and per variant: dates, compare-at, sale price, the reference price in force and what changed. Pick a period, export the CSV, file it with your records — if an authority asks, this is what you show.

A typo fixed within 24 hours, a test price, an unpublished product — you can exclude such a price point from the reference, with a reason, dated and logged; the exclusion shows in the compliance report and is reversible. What you can never do is type in a higher reference: the reference is always a price that was actually charged. Declaring a lower price charged elsewhere is always allowed.