I solely know about one change for positive but I'm pretty confident it is a widespread idea and applies to many different exchanges, too. These charts exist in traditional markets, too. There, a candle stick sometimes represents 1 day. That day has amongst others an opening and a closing value. Observe that the closing price December 29th doesn't need to be the opening value of December thirtieth and the opening price of December twenty ninth wasn't necessarily the closing price of December 28th, in such markets. In fact, it is pretty unlikely that these costs are the same. Its candlesticks are different. To start with, they have completely different sizes depending on the size of the time frame the diagram exhibits. In the 48 h chart, they solely are quarter-hour extensive. In the 1 Y chart, they're as vast as in old markets: 1 day. In the 5 Y chart, they are per week broad. Moreover, the closing value of 1 candlestick is all the time the identical as the opening worth of the next one. It is because they simply slice time up on the clock (00:00, 00:15, 00:30, and so on.) or calendar (December 29, December 30, December 31th, and so on.). Each time slice's opening price is the worth when that point slice began and its closing value is the worth when it ended. As a result of the one time slice begins proper when the one earlier than it ends and price is is simplified to a function of time, the opening worth of a slice must always be the identical because the closing value of the previous one.