Indicator Heiken_Ashi_Smoothed with the possibility of changing its timeframe in its input parameters:

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

For the indicator to work, indicator Heiken_Ashi_Smoothed.ex5 must be in the <terminal_data_catalog>\MQL5\Indicators folder.

Fig.1. Indicator Heiken_Ashi_Smoothed_HTF