Why does the chart on a coin vary between exchanges? Look at the BCH chart for instance, the 8 november there is a wild selloff following the cancelation of the new scaling protocol for bitcoin. This has nothign to do with BCH but causes a selloff nevertheless, on big volume with  a long deep red candle. This is on Bitfinex. Then look atr the same
chart at Kraken. No long deep red candle, no selloff.

So I guess either the chart was edited (manipulated) afterwards, or no Kraken customers sold any BCH outside that range on the chart?
There is no central market for the bitcoin or other altcoins. 

Crypto currencies are exchanged on each exchange for the price set by people transacting there. This means that the price is set exchange by exchange, not centrally for every coin.

Thus the variance of the graphs.

Cheers, David