The price and, ultimately, the charts on any given exchange are determined by the price of the most recent transaction. How can the prices of 100s of cryptos all move in the same direction at the same time?
Because all the coins in the crypto market are just dependent on whatever the price of bitcoin will be. Bitcoin is the driving factor in crypto, so whatever it’s price will create a huge impact on the rest of the coins. If bitcoin is bullish, most likely the whole market will be lively and bullish too. Same goes when bitcoin is bearish, the whole market will sympathize and end up being low priced too.