Defining Correlation
The reason for the interdependence of currency pairs is easy to see: if you were trading the British pound against the Japanese yen (GBP/JPY pair), for example, you are actually trading a derivative of the GBP/USD and USD/JPY pairs; therefore, GBP/JPY must be somewhat correlated to one if not both of these other currency pairs. However, the interdependence among currencies stems from more than the simple fact that they are in pairs. While some currency pairs will move in tandem, other currency pairs may move in opposite directions, which is in essence the result of more complex forces.

Read more: Using Currency Correlations To Your Advantage | Investopedia http://www.investopedia.com/articles/fo ... z4ISZ7Ob3E

I have more than a week , I try programming an EA multipairs to mt5 but I can't ... I can only test the EA in mt5 to many pairs but I would work with correlation between 2 pairs . Any one can help me plz.
I would that the orders are directed to a pair without the other.

I would to close the buy EURUSD and the buy USDCHF when the profit average is positif.
I would to close the sell EURUSD and the sell USDCHF when the profit average is positif.
I must specify the lot and the symbole of each position.

I set it like this
http://i63.tinypic.com/31681m1.png

https://fxdreema.com/shared/6QUK6c0Vd

I use 'string" but the EA not work

http://i64.tinypic.com/2ch3m1z.png

I would help to imput Pairs without problems

I can't do this

I test this bloc, but I would build an EA to work with the correlation between two pairs like EURUSD / USDCHF ... The two pairs is opposite I would to do Hedging between the two pairs BUY+BUY /SELL+SELL each buy for one pair and each sell for one pair and after that I close the two buy" or the two sell when the Profit average is positif.

http://i64.tinypic.com/2ch3m1z.png

How to put the name of pair symbol in input and how to connect it . Each way I put in "input" double pair1 EURUSD there is a problem .

Thanks a lot