This comment is almost like a copy-paste every time some kind of crypto trading article is submitted. I might have missed something in the article / code but this isn't an arb strat? It is just using some moving averages to try to follow a perceived trend in different trading pairs on a single exchange.

Counterparty risk definitely still exists, but it is getting better very quickly with the growth of regulated US-based exchanges like gdax, gemini, and ledger x. In the altcoin world, Bittrex is in the process of fulfilling state-by-state requirements for regulatory approval. The crypto world is very different today from when MtGox dominated and getting even better.