Current price is $4414 on preev and Bitfinex, but OKCoin's bitcoin rate at $4436, slightly higher than other global exchanges.
Bitcoin price expected to increase during this month due to many good news about bitcoin development and acceptance across the world, especially we're facing BTG hard fork which may ended as another free coin for everyone who hold bitcoin. That's why people willing to buy bitcoin as much as they can in order to get more BTG at the day of distribution. Let's see how much bitcoin could achieve today and tomorrow, and I guess bitcoin will reach $5000 by the end of this month.