Index Comparaison

When you trade many FX-Cross it would be very beneficial to have a feature to compare e.g. the index of the larger currencies (USD – EURO – YEN – GBP- AUD- NZD – CAD-CHF-SGD-TRY) alternative a user defined feature where you could compare the defined currencies (e.g.) above mentioned.
This would allow to pick the strongest and the weakest and trade those crosses against each other for the most optimum trade.