The DevilStra strategy is a trading strategy implemented as a class that inherits from the IStrategy interface. It includes the following methods:
populate_indicators: This method is responsible for populating indicators on the given DataFrame. It takes a DataFrame and metadata as input and returns the modified DataFrame.
populate_buy_trend: This method populates the buy signals on the DataFrame based on specific conditions.
It retrieves the necessary parameters for the buy signals, such as indicators, crossed indicators, operators, and numeric values, and generates conditions accordingly.
The conditions are appended to a list, and if any conditions exist, the DataFrame is updated with a value of 1 in the 'buy' column where all the conditions are satisfied. The modified DataFrame is then returned. populate_sell_trend: This method populates the sell signals on the DataFrame using similar logic as the populate_buy_trend method. It retrieves parameters for sell signals, generates conditions, appends them to a list, and updates the DataFrame with a value of 1 in the 'sell' column where all the conditions are met. The modified DataFrame is returned. Overall, the DevilStra strategy uses indicator-based conditions to generate buy and sell signals on the given DataFrame. It provides flexibility in defining multiple indicators and conditions for generating signals, allowing for the backtesting of various trading strategies.