Figure 1.
The dual-axis line chart shows the trends of crude oil prices and United States Dollar Index from June 2017 to June 2023. The horizontal axis represents time in yearly intervals. The left vertical axis ranges from 85 to 115 and corresponds to the United States Dollar Index. The right vertical axis ranges from 20 to 140 and corresponds to crude oil prices. The chart includes two lines. The United States Dollar Index fluctuates moderately until early 2020, dips sharply, then rises steadily, peaking in 2022 before slightly declining. Crude oil prices show a similar pattern with more pronounced peaks and valleys, reaching their highest point around 2022, followed by a decline toward 2023.Time-series chart of closing prices
Source: Authors’ own work