... BTC translations were fast enough you could easily buy on bittrex and sell on poloniex. but BTC is so slow.
BTC will always be seen slow against arbitrage trading because it takes 6 or more confirmations at both the exchanges to credit the BTC and make it available for trade. Though, the difference, like you think, is not even that much to curb with the fee that they normally charge over a buy/sell trade, so leave the idea of arbitraging at these two exchanges and find something else.
10 minutes for every confirmation with $0.5 fees. But it will get a lot of the fees for every arbitrage trade. The volatility has made it impossible.
