Supported exchanges are currently: Kraken, GDAX, Bitfinex, Bitstamp and Coinfinity.
You can easily choose between the following pairs:
BTC/EUR BTC/USD BTC/GBP BTC/ETH ETH/EUR ETH/USD.
Switching to another pair allows you to grow your understanding of the overall market situation. It also allows you to check the performance of Bitcoin against different currencies as well as other cryptocurrencies (like Ethereum).
Change & Volatility Monitor: The Change & Volatility Monitor describes, how and how strong the price has changed. If Bitcoin did perform positively within the given time span, it's colored in green. Otherwise it's colored in red. Further intervals allow you to examine the price action more closely. The displayed price for an interval is the average price of all exchanges for that moment. Furthermore, its relative change compared to the price 24 hours ago gives you an understanding of the trend and volatility of the market.
The arbitrage potential is a hypothetical profit based on a theoretical calculation.