The DevilStra strategy is a trading strategy implemented as a class that inherits from the IStrategy interface. It is designed for backtesting purposes on a backtesting website. The strategy consists of three main components: populating indicators, populating buy trends, and populating sell trends.
In the populate_indicators method, the strategy takes a DataFrame and metadata as inputs and returns the populated DataFrame.
However, in this implementation, the method simply returns the original DataFrame without any modifications.
The populate_buy_trend method populates the buy trend in the DataFrame based on specific conditions. It retrieves a list of whitelisted trading pairs and determines the index of the current pair in the list. It also retrieves buy spells and their corresponding parameters based on the pair index. Then, it generates conditions using the provided indicators, crossed indicators, operators, and numerical values. The conditions are appended to a list, and if there are any conditions present, the DataFrame is updated accordingly by setting the 'buy' column to 1 for rows that meet all the conditions. Similarly, the populate_sell_trend method populates the sell trend in the DataFrame. It follows a similar process as the populate_buy_trend method, but with sell spells and parameters. It's important to note that if the number of whitelisted pairs exceeds the number of buy or sell spells, a warning message is printed, suggesting the need to re-hyperopt the strategy and make appropriate adjustments. Overall, the DevilStra strategy generates buy and sell signals based on specific conditions derived from indicators and their corresponding parameters, allowing for backtesting and evaluation of its effectiveness.