Indicator showing other timeframe indicator

Hello,

i am trying to create an indicator (bollingers bands) showing an other timeframe bollingers bands values (in my case, charts is 5mn timeframe and indicator should show bollingers UT1h timeframe) but nothing is shown ( bollingers are shown only if indicator timeframe > charts timeframe)...but i can not find where is my mistake, could you help me to solve it please ?

thanks in advance,

Here the code :

using cAlgo.API;
using cAlgo.API.Indicators;

namespace cAlgo.Indicators
{
    [Indicator(IsOverlay = true, AccessRights = AccessRights.None)]
    public class BollingerOtherTimeFrame : Indicator
    {
        private Bars ms2;
        private BollingerBands boll_ms2;

        //SIGNAL SETTINGS
        [Parameter("Boll Timeframe")]
        public TimeFrame _ms2_timeframe { get; set; }

        [Parameter("Period", DefaultValue = 20)]
        public int Period { get; set; }

        [Parameter("SD Weight Coef", DefaultValue = 2)]
        public int K { get; set; }

        [Parameter("MA Type", DefaultValue = MovingAverageType.Simple)]
        public MovingAverageType MaType { get; set; }


        //2nd timeframe Bollingers
        [Output("Boll Top UT2", LineColor = "White", Thickness = 2, PlotType = PlotType.DiscontinuousLine)]
        public IndicatorDataSeries BollTopUT2 { get; set; }

        [Output("Boll Bottom UT2", LineColor = "White", Thickness = 2, PlotType = PlotType.DiscontinuousLine)]
        public IndicatorDataSeries BollBottomUT2 { get; set; }



        protected override void Initialize()
        {
            ms2 = MarketData.GetBars(_ms2_timeframe);
            boll_ms2 = Indicators.BollingerBands(ms2.ClosePrices, Period, K, MaType);
        }

        public override void Calculate(int index)
        {

            //UT2
            BollTopUT2[index] = boll_ms2.Top[ms2.OpenTimes.GetIndexByExactTime(Bars.OpenTimes[index])];
            BollBottomUT2[index] = boll_ms2.Bottom[ms2.OpenTimes.GetIndexByExactTime(Bars.OpenTimes[index])];

        }
    }
}