There is a way to test the Universal Alerts applied to other indicator in the Strategy Tester using only the Free Demo:

1. Create a template named "Tester.tpl" with the indicator you want to apply Universal Alerts on.

2. Configure the parameters of Universal Alerts correctly and start the backtest (if the indicator you want the Universal Alerts to be applied is a chart indicator, then Window=0 and Index=0).

3. Execute the backtest