This bot consists of several parts:
It has an init method that initializes the bot's state (including the data source, broker, portfolio, and rules), as well as read_trade_signals, execute_trade, and run methods that implement the bot's behavior.
The execute_trade method buys or sells a symbol based on a signal, and updates the bot's portfolio accordingly.
It first reads the latest trade signals and executes any trades based on them. It then iterates over each symbol in the bot's portfolio, gets the current price from the data source, and checks each of the bot's rules to see if it should buy or sell the