CFDs are a leverage product and can involve a significant risk of loss. Trading CFDs may not be suitable for all, therefore you should ensure that you understand the risks involved and take into account your individual circumstances.
Trader's Glossary

What is Back-Testing?

Back-testing is the process of testing an algorithmic trading system (Expert Advisor, trading bot) over historical price data in order to determine how it would have performed in those market conditions. This necessarily involves tweaking its parameters and re-testing it in order to optimise its performance. FxPro’s EA Library offers a number of free and paid automated strategies that have been back-tested, optimised and are ready-to-trade.