Arbitrage on Kraken?

When you take the time to find correlations or market-dysfunctionalities, there are still a lot of profitable Opportunities out there in the Crypto-World.
In this case, it looks like - based on backtesting results - if XRPUSD on Bitfinex is rising, while XRPUSD on Kraken is falling, the propablity is high, that price on Kraken will start to rise too.
This is what I call "CryptoArbitrageDivergence", because the price-movements of the same crypto-currency is heading in different directions on different Exchanges.