1) minimum is recommended to be 1000 $ however it is not an obligation.
2) Yes, I am using fxopen as my broker and it is okay till now, However I can not make any specific recommendations. By the way this signal runs on a VPS server in the US (FYI).
3) I have to emphasize that trades are only closed by SL/TP and not by other factors such as time limit, end of month re-balancing, war, love, brexit, grexit, Oexit, elections etc. Only by SL or TP. because this signal is pure technical analysis and not fundamental. Albeit i should say that market conditions are continuously monitored which might result in change of SL/TP positions it means that they are not hard stops. beware of this too. Also my personal withdrawals or deposits should not affect your copying because I think the system calculates the ratio of provider and follower balance and will copy according to your own margin and equity. At least I think you can set it to do so. I recommend you to consult with the website developers about this because i am not completely informed and there will be no guarantee that i wont do withdrawals or deposits at any time (although probably will be not often to do so).
4) Yes, As i said because the signal is based on technical analysis it does not care even a bit about fundamentals. In our perspective we make the fundamentals and not them. However positions might be reduced in case of minor technical signs of reversal. this reduction might be a little augmented if significant risks are eminent.
hope this was helpful
All the best