Indicator RoundPrice-Ext 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 RoundPrice-Ext.ex5 indicator must be added to the <terminal_data_directory>\MQL5\Indicators folder.

Fig 1. Indicator RoundPrice-Ext_HTF