Be careful when back testing correlations

 

I see that iClose and other i-functions may not synchronize with the base chart if the base chart is not of the same pair as the i-function. As an example, see the chart of AUD/USD M1 below with a simple indicator derived from iClose("EURUSD",1,i) . It appears that the EURUSD break down occurs at 23:14 well ahead of the AUDUSD break down. WooHoo, I have a leading indicator! However it is easy to confirm that the break downs actually occurred simultaneously. Furthermore, if the indicator is applied to the EURUSD chart it remains in perfect sync. Just wondering if anyone else has experienced this and if there is any solution to making them remain in sync. Note: this chart was made by looking back about one day from the current time.


Chart of AUD/USD M1