A trading system implies a method or a scope of rules, which allows traders to understand in a very short period of time what is happening on the market at the moment and assess whether there are chances to open a position.
A broker is a term not only for financial markets: brokers provide their services in many different fields, but the general principle of their operations is similar.
Let’s consider the etymology of the word “trading”. “Trading” is derived from English “to trade”. Thus, we may come to the understanding that trading is some kind of activity, which is related to buying or selling something.
The financial market consists of several segments, such as a securities market, a currency market, and so on.