Copy Trading System EA (Master & Slave)

A) there is a copy trading ea in the market that I want to modify, so I will give you the link to that ea and build a similar ea but with one change. The problem with that ea is that every trade has a different magic number, I need that each slave ea will have it's own magic number. For an example: if I have two slave copy traders, "copy trader 1" and " copy trader 2", so the magic number of ALL of the trades that "copy trader 1" opens will have the same magic number, and ALL of the trades that "copy trader 2" opens will have the same magic number but a different magic number than the trades that "copy trader 1" opens, slave copy trader should have it's own magic number to it's trades.

B) I need you to develop a new and simple copy trader that it makes sure that the account that is getting the trades will have only one type of magic number, so when the first trade opens it copies it and then it copies only trades that have the same magic number, until all of the trades close and only then it copies the first trade that opens, whatever magic number it has, like that all of the trades that it copies have the same magic number.