Hi.
Your project is called Trade Copier, so i assume that by "design me new EAs which can send forex signals" you didn't mean new MT4 feature (MT4->Tools->Options->Signals).
Now about trade copying, it would be pretty clear if not "single/multiple Master"... I will have questions about that.
For example, would be number of Masters predefined? Because Slaves should connect to Masters to get signals, and to do that they will need to know Masters IPs. So number of Masters and their IPs should be predefined. Or else Slaves would need to provide their IPs, because at least one side should know the other side to be able to make a connection.
Also will have questions about handling trades by Slaves as trades would come from different Masters accounts.
But in general, the task is clear.
Also if there are additional requirements, i would like to see them before begin. Because if you need some advanced clients handling etc, the Bid price and delivery time may change.
Good Luck.