Bitcoin price is based on supply and demand so Its very normal that the price is not the same in the different exchanges. The huge difference though is mostly caused by news/new laws/exchanges stopping withdrawals to certain banks etc. pretty much a lot of factors.
DifficultyAdj. BlockRR. BlockNo. Network H/s
2016 blocks 50 % 469.856,0 4.858.828.264,2
I'm not sure about BlockRR. The first is how often the network difficulty[1] changes, BlockNo is the number of the last block mined, Network H/S is the hashing power that is generated by the miners.
[1]
https://en.bitcoin.it/wiki/Difficulty