If we want to sell, then we can apply market making by placing a small sell order in the first place (top) of the Order Book. If we face a lot of competition from other sellers, and our order has been moved 4-5 positions below from top, and at the same time the purchase orders on the opposite side of the Order Book are fulfilled, then we have to suspect that the price will fall and that we should consider to apply market taking and to sell immediately - while we still have profitability. If, however, the order we initially set up is immediately fulfilled, then we must have reasonable suspicions that the price will rise and if we want to have more profitability, we should place our order in different price - higher than we initially did.