PAIRS TRADING - 4 ASSETS

I need an EA that perform pairs trading using up to 4 assets. 

EA will operate when the result of operation (S) of A, B, C and D close price will be major/minor that cond1 or cond2. In this case EA will buy/sell A, buy/sell B, buy/sell C, buy/sell D. 

The operation will finish, when stop loss or take profit or other condition will be achieved. 

Also, EA will start and stop its operation at time selected.

Fields:

Asset A <Text> (Required) EURUSD

Asset B <Text> (Required) GBPUSD

Asset C <Text> (Optional) EURGBP

Asset D <Text> (Optional) USDBRL

Amount A <0.00-xxx> (Required) 0.5 

Amount B <0.00-xxx> (Required) 0.7

Amount C <0.00-xxx> (Optional) 0.8 

Amount D <0.00-xxx> (Optional) 1.2

S < Cond 1 <spread1> (Optional) 1.0045

S > Cond 2 <spread2> (Optional) 1.009 

S = A <Multiply/Divide> B <Multiply/Divide> C <Multiply/Divide> D   A * B / C / D

Trade A @ Cond 1 <Buy/Sell> (Required) Sell

Trade B @ Cond 1 <Buy/Sell> (Required) Buy

Trade C @ Cond 1 <Buy/Sell> (Optional) Buy

Trade D @ Cond 1 <Buy/Sell> (Optional) Sell

Loss <% of cond1 or cond2 or none> (Optional) 0.1

Profit <% of cond1 or cond2 or none> (Optional) 0.1

Start <00:00-23:55> (Optional) 08:00

End <00:00-23:55> (Optional) 19:35

Note:  If Asset C and/or Asset D are not filled, these items can be ignored: Amount C, Amount D, B <Multiply/Divide> C <Multiply/Divide> D, Trade C @ Cond1, Trade D @ Cond1.

Using examples above: 

a) EA will start operation at 08:00 and finish/close position at 19:35.

b) If S=A*B/C/D < 1.0045, EA will sell 0.5A, buy 0.7B, buy 0.8C and sell 1.2D. When S<1.0035 (-0,1% of 1.0045) or S>1.0055 (+0.1% of 1.0045) or S>1.009 (cond2), EA will close operations.

c) If S=A*B/C/D > 1.009, EA will buy 0.5A, sell 0.7B, sell 0.8C and buy 1.2D. When S<1.008 (-0,1% of 1.009) or S>1.01 (+0.1% of 1.009) or S<1.0045 (cond1), EA will close operations.

Any doubt, please let me know.