I have 32 demos running from the same broker. This should not be a problem. Rename the terminal.exe to a different name each time. I just number mine. So terminal-1.exe etc…. I also run mine in portable mode so that all the data and program files stay within one folder instead of being split to the roaming folder as windows likes to do. Enter (space)/portable after the execution line in the shortcut and this will keep everything relating to that platform within the one folder. The more terminals you have the more you have to keep them trimmed up (reduce amount of bars , remove historical data etc) or your pc will start to slow down…. BTW 32 mt4’s in total is the maximum amount that the builders of MT4 will allow you to have on 1 PC.