Preset price ranges are currently based on the 30-day minimum and maximum prices for each pool’s token pair. For conservative range, the lower end of the price range is the minimum divided by 2.5, and the upper price is the maximum, multiplied by 2.5. For the standard range, the lower price is the minimum divided by 1.75, and the upper price is the maximum, multiplied by 1.75. We plan on continuing to iterate on how we calculate the preset price range based on user feedback.