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This is an options strategy tool designed for options traders. Through the APP, users can construct and evaluate the performance of various options strategies to help users easily advance options investment. Currently, the APP supports the following features: > Support of stock, options of any buy, sell portfolio strategy. > Support of looking at strategy's cost, breakeven point, maximum loss, maximum gain and other core indicators. > Graphically show the payoff curve of the strategy. > Built-in strategy payoff calculator, easy to evaluate a variety of stock prices under the strategy payoff situation. > Support local authentication, to protect user privacy and data security. > Supports both light and dark themes. > Supports both Chinese and English languages.