Fronting refers to the manipulation of market depth by traders placing one or more buy or sell orders for a particular asset (usually all of their orders are of a large size in the total number of pending orders) to create the illusion of demand or supply.

In other words, fronting implies that manipulators place large buy and sell orders in the market with no intention of filling them to create the illusion of supply and demand. Through these false signals, manipulators can cause prices to fluctuate, thereby profiting from market reactions.

This practice of fronting in the market can deceive traders and investors, leading to artificial price movements. It's essential to be aware of such manipulative tactics to make informed decisions and protect investments.