No, a trading teacher does not need to have a master's degree in forex trading business. However, they should still be well-versed in the industry and have a good understanding of the forex market. They should be able to provide insight into the different trading techniques, the different types of trading platforms, and the risks and rewards associated with different trades. They should also be able to teach the basics of trading, such as how to use technical indicators and how to read a chart. Additionally, they should be able to provide guidance on how to manage risk and how to make the most of the trading opportunities available.