I usually use SFOX (sfox.com) since they let me trade on multiple exchanges at the same time and I'm big on arbitrage (I have scripts to do it for me). Not sure

I usually use SFOX (sfox.com) since they let me trade on multiple exchanges at the same time and I'm big on arbitrage (I have scripts to do it for me). Not sure why they're not more popular. Most UIs on exchanges are utter shit so at least SFOX's is decent.