The Heiken_Ashi_Smoothed_VolatilityStep_Alerts indicator with the ability to change the indicator timeframe using input parameters:

input ENUM_TIMEFRAMES TimeFrame=PERIOD_H4; // The indicator chart period (timeframe)

For the indicator to operate, the Heiken_Ashi_Smoothed_VolatilityStep_Alerts.ex5 indicator should be added to the <terminal_data_directory>\MQL5\Indicators folder.

Fig.1. The Heiken_Ashi_Smoothed_VolatilityStep_Alerts_HTF indicator