Numbers come straight from Meta's Marketing API each time the page loads or the dates change.
Amounts are in each account's own currency.
Outbound link click rate is Meta's outbound CTR: outbound clicks ÷ impressions.
Add to cart, checkout initiate and purchase rates are each of those events divided by landing page views.
Today, Yesterday and the day ranges follow each account's own time zone, the same way Ads Manager does. Custom dates are read in each account's time zone too.
Blended ROAS by day combines the switched-on accounts; each card has its own ROAS-by-day line. Both use a fixed 0–4× scale: days above 4× sit on the top edge, and hovering shows the exact value.
Switch an account off on its card to leave its numbers out of the blended ROAS and the summary; each browser remembers its own choice.
Orders come from shopmidra.com and ad spend from Meta each time the page loads or the dates change. Profit for each order: its revenue (after discounts and refunds, shipping charged included, tax left out) minus product cost (Shopify's "Cost per item" where it's filled in, otherwise a flat cost per item), courier per order, and packaging by country: brown box and packing per order plus pick, pouch and white box per item. Orders that were sent keep their courier and packaging costs even if returned later; voided orders that never left are left out, minus ad spend. Each ad account's daily spend is shared across that day's orders from its countries, by order value; spend on days with no matching orders still counts against the total. Cancelled and test orders are left out, and switching an account off leaves out its orders and its spend. Dates follow the store's time zone; ranges go up to 31 days.
Daily budget is the sum of active campaign budgets plus active ad set budgets right now; it doesn't change with the date range.