The Volatility2Step_Alerts with the timeframe selection option available in its input parameters:
input ENUM_TIMEFRAMES TimeFrame=PERIOD_H4; // Indicator chart period (timeframe)
For the indicator to operate, the Volatility2Step_Alerts.ex5 indicator should be added to the <terminal_data_directory>MQL5Indicators folder.
Fig. 1. Volatility2Step_Alerts_HTF indicator