The CorrelationMatrix indicator for MT4 was posted
here. This indicator allows to plot matrix for:
CorrelationMatrix_v1.1 forex.png
CorrelationMatrix_v1.1 indices.png
CorrelationMatrix_v1.1 stocks.png
Also you can use the pre-smoothed price using the AllAverages indicator. Plus there are alerts for correlation crossovers with important negative/positive levels.
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