This is the 11205th most frequent Turkish word.
dövizdeki
"Related to foreign exchange/currency."
In this sentence, 'dövizdeki' describes the 'durum' (situation) as it pertains to 'döviz' (exchange rate).
Dövizdeki durum şu anda oldukça kritik.
The situation in the exchange rate is quite critical right now.
'Dövizdeki' in this case specifies 'hızlı değişimler' (rapid changes) as relevant to the domain of 'döviz' (exchange rate).
Dövizdeki hızlı değişimler yatırımcıları endişelendiriyor.
The rapid changes in the exchange rate worry investors.
Here, 'dövizdeki' refers to something 'occurring in the context of the exchange rate,' modifying 'dalgalanmalar' (fluctuations).