The dollar had been getting stronger since around March. The dollar once went down but is getting stronger again. It is easy to understand by using "USD/(other currency)" as the Y-axis.
The following is in Japanese. 3月頃よりドルが強くなってきていた。 ドルは一度下降したが再び強くなってきている。 "USD/(他の通貨)" をY軸にすると分かりやすい。