Why are you telling us this?
How will the 2 trades ever make a net profit?
you can try
When I read this as you talked about copying, I thought that you were just opening an opposite order with the same symbol.
Then I realised that you were opening a Sell GBPUSD and a Buy EURUSD, so I was mistaken.
But there is still no point in the idea as it is exactly the same as Buying EURGBP, so the trades will make a net profit if EURGBP rises.
So you may as well just Buy EURGBP ans save on transaction costs.