What is the difference between trader and distributor?

A distributor is one who buys product from the manufacturer and bound to not to sell any other similar or competitive product and he can appoint dealers whereas the trader is one who buys product from the dealers/wholesellers and they are not qualify as a typical retailer,they sell directly to the consumer.

i think the general order is:-

Manufacturer

Distributor

Wholesaler

Trader/Retailer

Consumer

correct me if i m wrong.