Indicator EMAVFS_StDev with the timeframe selection option available in input parameters:
input ENUM_TIMEFRAMES TimeFrame=PERIOD_H4; // Indicator chart period (timeframe)
For the indicator to operate, the EMAVFS_StDev.ex5 indicator must be added to the <terminal_data_directory>\MQL5\Indicators folder.
Fig.1. Indicator EMAVFS_StDev_HTF