Stocks are picked from the screens every holding period (between 1 and 24 months) and held for that period.
Instead of selecting from the available screens, you may choose to enter codes from any of the backtesters to create hybrid tests. Simply copy the link listed at the top of a run & paste into the form. Also see the backtester code guide.
If you want to simulate actual trading, you can enter more parameters in the trading simulator.
You may give your backtest a name for convenience. If you use this backtest code in other testers, its name will be shown instead of a full description.