The given code represents a trading strategy called "emacrossover" that can be used for backtesting on a trading platform. Here's a breakdown of what the strategy does:
The strategy is based on the concept of exponential moving average (EMA) crossover, which involves comparing two different EMAs of a trading instrument's price data. The strategy uses four parameters: buy_fastema, buy_slowema, sell_fastema, and sell_slowema.
These parameters represent the time periods for calculating the EMAs used in the strategy.
The strategy has a predefined minimal ROI (Return on Investment) table, which specifies the expected returns at different time intervals.
For example, after 0 time units, the expected ROI is 0.16412. The strategy also has a stop loss value of -0.32523, which indicates the maximum acceptable loss before exiting a trade. The timeframe used for the strategy is set to 15 minutes. The strategy has two main functions: populate_buy_trend and populate_sell_trend. These functions are responsible for generating buy and sell signals based on the specified conditions. In the populate_buy_trend function, the strategy checks if the fast EMA is greater than the slow EMA. If this condition is met, a buy signal is generated. In the populate_sell_trend function, the strategy checks if the fast EMA is less than the slow EMA. If this condition is met, a sell signal is generated. Both functions modify the input dataframe by adding a 'buy' or 'sell' column with binary values (1 indicating a signal and 0 indicating no signal) based on the specified conditions. Overall, the emacrossover strategy aims to identify potential entry and exit points for trades based on the crossover of exponential moving averages.