This indicator displays a synthetic price, here USD (average of the main USD pairs).
Instead of trading one pair, we can trade a basket of pairs according to this synthetic USD index.
Possible currency to select : USD, EUR, CHF, GBP, AUD, NZD, CAD, JPY.
We could imagine a synthetic price with the most trending (up / down) pairs. A synthetic market price, with the main 28 pairs. Etc...