fluctuationfluc·tu·a·tion /ˌflʌktʃuˈeɪʃən/ noun [countableC, uncountableU] the movement of prices, income, rates etc as they increase and fallFluctuationsin profits resulted from differences between the volume of sales and the volume of production.
Buying patterns are usually subject to upward or downward fluctuation caused by changes in the market.
Although market fluctuations are inevitable, the stock and futures markets are basically solid.