XPT/XPD: what to know
The XPT/XPD rate shows how much XPD you get for 1 XPT. Right now, 1 XPT buys 1.3791 XPD at the mid-market rate. In the other direction, 1 XPD is worth 0.7251 XPT.
In the short term XPT is driven mainly by industrial (auto) demand and supply, while XPD responds to auto demand and tight supply.
Platinum is rarer than gold and vital for catalytic converters. Palladium is used mainly in petrol-engine catalytic converters.
Because this pair involves a precious metal, the rate reflects global bullion prices per troy ounce. Use this mid-market figure as your benchmark: compare it with the rate your bank or broker quotes, and the difference is the margin you would pay.