Decisive Options is such a trading simulator that we can use to practice our trading skills. It is also a technical analysis tool and robotic trading system development tool. We can use it to analyze market trends and create AI enhanced trading robots to improve our chances of success. Main features are: * More than 5000 stocks and ETFs price data, even including ones that no longer exist today. * The ticker names can be swapped, so historical price data can be used for training without prior knowledge. * The training time step scale can be adjusted, so both short term trading and long term investment strategy can be practiced. * The option trading is available. * The price data is stored local, so the training can be practiced off line. * More than 10 technical indicators are included, and more can be added later. Users can even add their own. * More than 6 trading robots are included, and more can be added later. Users can even add their own. * The trading trainer can be run locally with or without a trading robot opponent. * The trading trainer can be run in a multi-player mode with a trading robot opponent or a human opponent. * Cross-platform. It runs on any system that can run Java. Supported platforms are: LINUX/UNIX, Windows, MacOS