Why do gold prices in CHF fluctuate daily?

There are three main reasons for this. Firstly, the global gold price is influenced by many macroeconomic and geopolitical events. Secondly, the strength of CHF can change quickly for the same reasons, as well as local events such as Swiss GDP data. Thirdly, an ounce is a relatively small unit of measurement, so it's easier to notice incremental changes in the gold price compared to a much larger measurement such as per kg.