Some foreign exchange trading platforms can, but not every platform can trade the US dollar index? In fact, if investors are bullish on the US dollar index, they can arbitrage by shorting weak non-US currencies.

Dollar index: Dollar index (Dollar index? USDX is an indicator that comprehensively reflects the exchange rate of the US dollar in the international foreign exchange market, and is used to measure the degree of exchange rate change of the US dollar against a basket of currencies. It measures the strength of the US dollar by calculating the comprehensive rate of change between the US dollar and a selected basket of currencies, thus indirectly reflecting the changes in US export competitiveness and import costs.