CQG is a professional trading platform developed with the more advanced trader in mind, and in particular options and futures traders. This is, in other words, not a platform for new traders and traders with small accounts who just want to trade CFDs & forex. However, experienced ECN traders often enjoy trading with CQG thanks to its advanced features.
With CQG and other platforms, ECN trading involves connecting to an electronic communication network (ECN) that is shared between many banks and other financial institutions. Here, trades are matched automatically with each other instead of having the broker match trades internally, which is known as the dealing desk or market maker model.