text: from odin.events import EventsQueue
  from odin.handlers.portfolio_handler import PortfolioHandler
  from odin.handlers.position_handler.templates import (
      SuggestedProportionPositionHandler
  )
  from odin.handlers.execution_handler import SimulatedExecutionHandler
  from odin.handlers.symbol_handler import FixedSymbolHandler
  from odin.handlers.data_handler import DatabaseDataHandler
  from odin.handlers.data_handler.price_handler import DatabasePriceHandler
  import settings
  
  
  # Create a portfolio handler to manage transactions and keeping track of
  # capital.
  porth = PortfolioHandler(
      settings.maximum_capacity, settings.pid, settings.init_capital,
      settings.fid
  )
  
  # Events queue for handling market data, signals, orders, and fills.
  events = EventsQueue()
  # Symbol handler will determine which symbols will be processed during trading.
  # In this example, we will just trade the S&P 500 ETF (SPY).
  sh = FixedSymbolHandler(settings.symbols, [porth])
  
  # Set up a price handler and a data handler to provide data to the trading
  # system.
  dh = DatabaseDataHandler(
      events, sh, settings.start_date, settings.end_date, settings.n_init
  )
  # Execution handler executes trades.
  eh = SimulatedExecutionHandler(dh)
  
  # Position handler to determine how much of an asset to purchase.
  posh = SuggestedProportionPositionHandler(dh)
  