Fortunately, it has nothing to do with the Hardfork. The median price is determined by the top witnesses. So it's an average of all from the witnesses reported prices. Currently there is a huge difference between different exchanges.
I receive the data from https://coinmarketcap.com and I guess the witnesses use other price sources. It's difficult to say which price is correct, but I will continue to use CoinMarketCap.
Ah ok thank you for enlighting me.
Hmmm I think it's a good idea to continue use coinmarketcap.
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