Duplicate trades

I need an expert advisor for MT4.

Problem:  We subscribed paid signals, but want to adjust the lot size of the copied trades on the same MT4 account.  

Goal:

1. automatically duplicate the trades which are opened on our MT4 terminal but come from a subscribed signal provider. 
2. being able to adjust lot size of the duplicated trade(s) 
3. close trade(s) automatically if the copied trade closes 

• Signal provider opens a trade EURUSD short with lot size 0.1 
• The trade is automatically copied to my terminal as I subscribed to this signal provider - now I also have an open positions EURUSD short with lot size 0.1 
• The EA (which I want you to build) duplicates the trade which is already open in my terminal but with adjusted lot size (lets say always 0.2). Now I have two open trades EURUSD short, one with lot size 0.1 and one with lot size 0.2. If the signal provider closes its trade, the trade in my terminal with lot size 0.1 also closes automatically due to the subscription - the trade with lot size 0.2 should also close synchronously due to the EA. 

•  there is only one subscribed signal on the respective MT4 account, and, except trades coming from the signal provider no other trades are placed on this MT4 account. More information on request.