Bitstamp
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This page pulls the data from multiple crypto exchanges via their websockets. It displays the average price for all exchanges, their respecting current price and the price difference.
The color of the card represents offset of current price from average price. The greater the offset, the darker the color
If this page has been helpful you can donate BTC to the following address:
bc1qrrz5dvtp5xphy3lfrrgeeq4slekzadcg58ay6s