Well, something isn't right. If you freeze current prices, I'd need to spend .92 of a BTC to get 5,800,000 GPUC at 16 satoshi (Atomic-Trade) which is $480 USD. Am I doing my math wrong?
No you are not doing your math wrong, but the store itself is pulling the numbers differently (not completely sure where the numbers are getting sourced from). If you go by the store numbers it's far lower.
I have adjusted the pricing slightly to reflect the asking price. Unfortunately I am limited to the api the exchanges gave me but I am willing to do. If anyone wants to suggest improvements I am completely open.
Here is the code for anyone interested :
http://pastebin.com/S8Szi9itAnd here is sample data from atomic + nxt-e
{"Coin":"GPU","Exchange":"BTC","CurrentPrice":0.00000012,"YesterdayPrice":0.00000013,"Price24High":0.00000015,"Price24Low":0.00000012,"PriceChange":-0.0769,"CoinVol24h":450160.23,"ExchangeVol24h":0.05435348}
and bittrex :
{"success":true,"message":"","result":{"Bid":0.00000006,"Ask":0.00000015,"Last":0.00000006}}