http://arbiswap.com/The ArbiSwap arbitrage tool monitors 800+ coins on the most popular cryptocurrency exchanges...
Binance,
Bittrex,
Bitfinex,
Kraken,
Poloniex and more... I designed it to disregard false arbitrage reports as much as possible by filtering out reported wallets under maintenance. It has a built in alert system that takes into consideration volume as well as the wallets under maintenance and the potential profit. I tried to provide as much info as possible so if a user finds a deal worth while they can pull up the amount of volume traded in the past 24 hours and a historical arbitrage chart.
Looking for current suggestions and feedback from the crypto community. I am trying to create the best arbitrage system for cryptocurrency. My system is great at finding deals I am not here to sell it but to present it to the Bitcoin talk community. It checks for arbitrage opportunities every 5 minutes and the moment it passes our filters it is sent out to the user.

you have to add the transaction costs and the withdrawal costs of the exchanges to monitor potential price differences.