The horizontal axis shows the time; relationships positioned towards the leftmost area of a diagram occurred at the start of the data interval considered, and those at the rightmost end occurred at the end of the data interval considered. The vertical axis shows the period; lower period bands (higher frequencies) are shown near the top and higher bands (lower frequencies) are near the bottom. Lower bands would be of interest to investors with short term horizons, whereas higher bands would be of interest to investors with longer term horizons.
Since the first digital currencies were devised after the financial crisis, $2.3tn has been invested in them. But how do they, and other assets transacted on blockchain technology, actually work? And what risks do they pose? Read our explainers

SAN SALVADOR, El Salvador (AP) — Salvadorans trying to pay for a cup of coffee or receive money sent from relatives in the United States using the cryptocurrency bitcoin continued struggling to perform transactions Wednesday, a day after El Salvador made it legal tender.
Binance U.S.’ trading algorithm suffered from a bug that resulted in a Bitcoin flash crash on Oct. 21. Although prices recovered quickly, both cryptocurrencies are now trying to hold support to avoid further losses.