You can set stop-loss and/or take profit values when calling strategy.buy or strategy.sell or self.buy or self.sell.

You may benefit from exploring my case of updating stop-losses dynamically.

This - https://github.com/s-kust/python-backtesting-template/blob/main/strategy/run_backtest_for_ticker.py - is the main Strategy template.

See also update_stop_losses function here - https://github.com/s-kust/python-backtesting-template/blob/main/utils/strategy_exec/stop_loss.py