价格变动的英文：
price change ;price fiuctuation ;range of price

参考例句：

Transfers at market price: price changes in the intermediate market.
按市价转移:中问价格的变动。

Instability index: An index which measures the variability of world prices for selected agricultural commodities.
不稳定指数:一种用于衡量部分农产品的国际价格变动的指数。

price是什么意思：
n. 价格，价值；代价
v. 给…定价；问…的价格

Prices are advancing.
各种物价都在上涨。

The price is outrageous.
价钱高得吓人。

Prices are on the rise.
价格在上涨。

change是什么意思：
n. 变化；交换，交替；零钱
v. 改变；交换，替换；兑换；更换

change a bed;change the baby.
换床单；给婴儿换尿布

We propose 'a change [making a change / to make a change / that a change should be made].
我们建议应做一点改变。

The change of quantity can causes the change of quality.
量变可以引发质变。