You should use BitPay's BBB (Bitcoin Best Bid) instead, it's looking at all a number of exchange order books and giving your the best price: https://bitpay.com/

You should use BitPay's BBB (Bitcoin Best Bid) instead, it's looking at all a number of exchange order books and giving your the best price: https://bitpay.com/api/rates/usd https://bitpay.com/api/rates/usd Disclaimer: I work at BitPay.