Why Corti`s calculation of Correlation is far superior to other services ?

I have been trading AUDCHF vs NZDJPY while they were correlated.
If you look their correlation here : https://www.mataf.net/en/forex/tools/correlation , u see a correlation of +91 ,
Do they look they are correlated ?

 

Corti for MT5 gives a Correlation Score of : [AUDCHF]-[NZDJPY]-[70.88]
This way Corti always is trading the strongest correlation.

You never know how many times you have been trading the wrong combinations because these kind of sites show you the wrong data.

Go verify yourself what I wrote above . This is what happens when these kind of sites have broker ads everywhere and get sponsored by them.