to which pair CADILS correlating?

 

may here it is somebody could explain of CADILS is corelating to some paire?

or how could correlating USDILS, EURILS correlating to CADILS?

or explain me what id algotithm to find out correlating pairs?

thank you

 
You can use Pearson correlation.

You can use stat.arb correlation
2-way-spread CADILS vs USDILS
3-way-spread CADILS vs USDILS vs USDCAD