The bank spreads are very high, generally, the major currency pairs are 10+, and the bank with the lowest spreads is China Bank, both of which are 10+. I don't know how you can have a difference of 7 o'clock, and the cross-currency pair is higher. Bank spreads are high and there is no leverage, which is suitable for medium and long term. If you want to make quick money, then you can't count on the bank's foreign exchange internal market. If you want to make a profit. If it's for fun, the bank will be fine, and it won't make much, and it won't lose much. Pure entertainment, low risk (learning finance while doing is also good). The change of interest spread can only show that there was a liquidity problem (insufficient liquidity) between currency pairs at that time. For example, if there are many buyers and few sellers, the price difference will be high, and it is rare to see a large price difference. Unless there is a major event, there will be a sudden explosion and a sharp fall, which will not last long. Generally, when the spread is high in the morning, there is no business, so the spread is high. (Generally, it is the internal market of the bank) And you said that the spread has changed greatly, which only shows that the internal market of the bank is not so popular.

Here I want to remind the foreign exchange market that the risk is higher than the stock market and the professionalism is higher than the stock market. If you are not a professional financial institution, it will be very noisy in the bank (you have to pay tuition if you win more or lose less). )