The RVIWithFlat indicator with the timeframe selection option available in input parameters:
input ENUM_TIMEFRAMES TimeFrame=PERIOD_H4;Β Β // Indicator chart period (timeframe)
To provide correct operation of the indicator, place the compiled indicator file RVIWithFlat.mq5 in terminal_data_folder\MQL5\Indicators.
Figure 1. The RVIWithFlat_HTF indicator