Final answer:
The traditional style of trading for traders was bartering goods and services, which later evolved into using a currency exchange system as societies grew and required more efficient trade methods.
Step-by-step explanation:
The regular style of trading of the traders was primarily through bartering goods and services. Initially, bartering involved direct exchanges without the use of a standard currency. As societies became more complex, the limitations of bartering led to the development of money as a means of exchange that could be used universally. Money evolved from objects like cowry shells and precious metals to the coins and paper currency we use today. Advanced trading systems evolved further to include credit systems and much later, online trading platforms.
In the past, without modern conveniences like a currency exchange system or online trading platforms, people needed to have a double coincidence of wants to engage in trade, which was highly inefficient. This led to the creation of money, which simplified transactions and allowed for more fluid economic activity.