bot mistake? human mistake in sell order price? or? it is 1minute chart and it was very fast. just want to learn what is behind it based on experienced traders

it is not a mistake. Someone make big sell orders on an exchange that has the lowest volume than some other exchanges on the same coin. He filled all open buy order there, and dump the price on this exchange at the moment. but it's not enough on the global market to significantly affect the price. it happens occasionally.