“…As one of Indonesia's export commodities, CPO will be an important part of international trade and will also have an impact on the IDR exchange rate as a transaction tool (Aprina, 2014). The previous study indicated that world CPO price will affect the exchange rate of a country (Amano & Van Norden, 1998;Ashfahany & Priyatna, 2015;Aziz & Applanaidu, 2017;Buyung et al, 2017;Edwards, 1986;Huda & Widodo, 2017;Iqbal, Hameed, & Devi, 2012;Kohlscheen, Avalos, & Schrimpf, 2016). Conversely, the previous study showed Granger Causality tests do not find any evidence that commodity prices Granger-cause exchange rates (Chen, Rogoff, & Rossi, 2010).…”