The principle of candle chart is the same, which consists of opening price, closing price, highest price and lowest price. Foreign exchange is a 24-hour market, the quotation is basically continuous, with few gaps, and the most gaps are occasionally seen when opening on Monday morning;

The futures market is different, and the trading time is limited every day, so there are often gaps. Even in the daytime market, if there are large orders to buy or sell, there will be gaps, especially the shorter the time period, the greater the frequency of gaps.

I recommend you to read the Japanese candle map, which is very well written and is the most basic book. If you want to bring it to Toya, you need a strong understanding, and it will bring you huge profits.