The ratios hold a relation of a redirect price (once a user clicked on some offer) and the identified lowest price for the entire search or a selected itinerary.
For example, when you have SearchLowestPriceRatio 1.12, it means the the redirect price was 12% more expensive than the identified lowest price of the search (position 0, rank 0). If ItineraryLowestPriceRatio is 1, it means the redirect was on the cheapest provider within a selected itinerary (you can check ProviderRank value, too).
If ratios > 1, it means a user clicked on a more expensive option (across all search results or within a selected itinerary).Typically these ratios will be ≥ 1, however, we’ve experienced some examples where it’s not the case. It is likely they are because of price/cache changes as users click on offers.