If you are looking for an alternative to Forex Tester, take a look at
https://forextester.com/blog/forex-tester-alternatives . This platform offers a more modern design and is available online on any device and operating system, including Windows, MacOS, Linux, Android and iOS. FTO provides free updated historical data, supports advanced trade and order management tools, and offers a professional level of analytics for backtesting. Despite some not yet fully implemented features, FTO is a great choice for those looking for a modern and affordable solution for testing trading strategies.