Restraint of Trade. Under the Sherman and Clayton acts, competitors colluding to divide a market into noncompetitive territories or to restrict competition in a market are in restraint of trade. Nor can dealers be required to refrain from selling compete-tors’ products as a condition of receiving the right to sell the manufacturer’s product.However,a unilateral refusal to deal with a price-cutter is not illegal so long as the manufacturer does not raise or maintain prices in doing so.