You are not required to use any specific brokerage. Our main dashboard is a stand alone windows application that provides market data from our servers and does not require a brokerage account to work.
The Tick Details indicator and Core Volumes indicator do require MT4 or MT5 to function. Any broker that offers MT4 or MT5 will work. You might consider checking into one of the larger brokers such as LMAX, IG Markets, Oanda, or Forex.com.
** Please note, we have seen issues when using a VPS. Some Virtual Private Servers do not allow for the external "calls" to our server and block the data from being received.