There seems to be actually a massive problem with missing liquidity on the crypto currencies CFD markets. Some brokers (traditional, not crypto exchanges) who recently introduced them suspended trading already again. Referring to the crypto exchanges I have no idea if automated trading in general and if especially arbitrage trading is really possible there. Technically there is a plugin for Kraken and BitTrex for now and in absence of any MT4 usage the other exchanges are not reachable. As far as I can see neither Kraken nor BitTrex offer demo accounts, so the show takes place with real money from the start. Has anyone already experiences in trading at one of these exchanges?