There are two main types of trading methods offered by overseas forex brokers: NDD (No Dealing Desk) and DD (Dealing Desk). Furthermore, the NDD method is divided into ECN (Electronic Communication Network) and STP (Straight Through Processing), so many people may be unsure which method to use. ... Read more: What are the NDD (ECN/STP) and DD methods in overseas forex trading? Explanation of differences, advantages, and disadvantages.