Only if you assume "automated" == "fraud", which is the distinction that grandparent is getting at. Imagine you have a completely manual market which follows n

Only if you assume "automated" == "fraud", which is the distinction that grandparent is getting at. Imagine you have a completely manual market which follows normal statistical distributions, including Benford's Law. Now you introduce one grid-trading bot with a large amount of capital. (A grid trading bot is basically a piece of software that automatically buys when the price falls below a certain level and then automatically sells when it goes above a certain range.) That one bot is going to make up the vast majority of transactions, because it's effectively "clamping" the price within its trading range. When random fluctuations take it below, it buys and sets a floor on the price. When random fluctuations take it above, it sells and sets a ceiling on the price. If you make the range small enough that most ordinary trades would end up occurring with the bot, it's going to take up the vast majority of volume. There's nothing illegal about grid trading. They work to dampen random price fluctuations in a market. In exchange, they take on the risk that fundamental supply & demand might shift enough that they're left holding the bag, eg. they run out of inventory to sell and then the price jumps sharply higher, or they collect all the inventory and then the price drops. But because they're non-human and take one side or another of most trades, they are going to account for a disproportionate amount of volume. This isn't fraud, it's that you don't understand the structure of the market.