Superimpose Two Currency Pairs on Top of Each Other

[[Deleted]]

Hello:

I'm trying to automate certain parts of a strategy that I'm doing visually with good success.  Essentially I'm trying to superimpose one currency on top of another.  For example, GBP/USD on top of EUR/USD.  If the currencies both traded between the 1.40 to 1.60 this would be easier, however, the issue is that currencies are often several thousand pips apart.  Even when I can map one currency on top of another and subtract the appropriate amount of pips, any repainting done on the main chart throws off all calculations and gives erroneous results. 

any suggestions?

[Paul]

I have used this one in the past but there are others, google for forex chart overlay usually does it.

http://www.forexfactory.com/showthread.php?p=2639318#post2639318

 Regards, Paul.