We sell gold and silver bullion. We would like a module like the "Selling Gold" module ([url removed, login to view];products_id=1091) that automatically updates product prices every 1 from a known precious metals index. Some products are fractional rounds (1/10 oz silver and gold rounds) so we would like the module to be able to calculate prices for the fractional rounds. When pricing products we would like to be able to price them as either a percentage, or a dollar amount in relation to the spot price of the precious metal.
Say the price of silver is currently $[url removed, login to view] and I am selling a 1 oz silver round. We would like to list the product at $2 above spot or 2% above spot. So we enter $2 and the total price would be $[url removed, login to view], if we enter 2%, the price would be $34.22. If the spot price jumps to $[url removed, login to view], then we would like the total price to increase to $[url removed, login to view] (if I entered +$2) or $[url removed, login to view] (if I entered +2%).
In addition I want a module that gives the current "live" price of gold and silver on our home page.