The daily limit is "China characteristic". European and American countries are market economies, and there is generally no daily limit.

But you don't have to worry about the exchange rate limit in the foreign exchange market. Imagine that it is almost impossible for the dollar to appreciate from 6.8 to 5.8 against RMB in one day. The result was disastrous.

The foreign exchange quotation is the exchange rate of two countries' currencies, which generally fluctuates slightly. Unless something very important happens, there will generally be no drastic fluctuations.