The large number at the top is the XAU spot price — what one troy ounce of gold is worth right now in your local currency, refreshed every 5 seconds from market feeds. The session open, high, and low in the metrics strip reset at the New York market open (17:00 ET) each day, so the range you see reflects only today's trading — not yesterday's close.
The change badge (the green or red figure next to the price) shows movement relative to the session open, not the prior day's settle. This matters because gold trades nearly 24 hours: by the time New York opens, London has already been trading for hours, so the "overnight" move is already baked in.