Help required

Hi,

I am a newbie coder and I am struggling to do the following as of now on a custom indicator - 
Set the value of certain variables in my code to 0 at the start of a new bar.

Can someone please let me know/post code as to how this can be done .

Since I intend to use data based on market depth volumes on a 1 min chart and the   void MarketDepthUpdated() method code runs as long as there is a change in any layers of the market depth -  I would like the indicator to change certain variables to 0 so that the calculations start fresh on the very open of a new bar as opposed to the arrival of the first tick after the completion of the previous minute.

I understand that there is an OnBar method for cBots but not for indicators. Would have been very handy if the OnBar method was available for indicators too :)


I have read through the forums regarding Calculate and OnTick  methods.When exactly is a new bar formed as  far as indicator calculations are concerned ? -  is it based on a new tick or based on time?
To clarify by 'based on time' I meant-
Example : for a  1 min chart -  is the new bar formed at 10:00:00
or
does it only form when the next tick arrives ,say at 10:00:05  i.e. 5 seconds later.



Below is the code I have done so far - 

using System;
using cAlgo.API;
using cAlgo.API.Internals;
using cAlgo.API.Indicators;
using cAlgo.Indicators;

namespace cAlgo
{
    [Indicator(IsOverlay = false, TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class mdb10 : Indicator
    {

        [Output("rbuyhist5", Color = Colors.Green, PlotType = PlotType.Histogram, Thickness = 1)]
        public IndicatorDataSeries Buy5Bias { get; set; }
        [Output("rsellhist5", Color = Colors.Red, PlotType = PlotType.Histogram, Thickness = 1)]
        public IndicatorDataSeries Sell5Bias { get; set; }
        [Output("rhistdelta5", Color = Colors.White, Thickness = 1)]
        public IndicatorDataSeries DeltaFive { get; set; }

        public MarketDepth _marketDepth;


        public double tobA0 = 0;
        public double tobA1 = 0;
        public double tobA2 = 0;
        public double tobA3 = 0;
        public double tobA4 = 0;


        public double tobB0 = 0;
        public double tobB1 = 0;
        public double tobB2 = 0;
        public double tobB3 = 0;
        public double tobB4 = 0;


        public double tobA5Sum = 0;
        public double tobB5Sum = 0;

        public double rbuyhist5 = 0;
        public double rsellhist5 = 0;

        public double rhistdelta5 = 0;

        public double ratiosell5 = 0;

        public double ratiobuy5 = 0;


        protected override void Initialize()
        {
            //  Get Market Depth
            _marketDepth = MarketData.GetMarketDepth(Symbol);
            // subscribe to event Updated
            _marketDepth.Updated += MarketDepthUpdated;
        }

        void MarketDepthUpdated()
        {

            foreach (var entry in _marketDepth.AskEntries)
            {
                tobA0 = _marketDepth.AskEntries[0].Volume;
                tobA1 = _marketDepth.AskEntries[1].Volume;
                tobA2 = _marketDepth.AskEntries[2].Volume;
                tobA3 = _marketDepth.AskEntries[3].Volume;
                tobA4 = _marketDepth.AskEntries[4].Volume;
            }


            foreach (var entry in _marketDepth.BidEntries)
            {
                tobB0 = _marketDepth.BidEntries[0].Volume;
                tobB1 = _marketDepth.BidEntries[1].Volume;
                tobB2 = _marketDepth.BidEntries[2].Volume;
                tobB3 = _marketDepth.BidEntries[3].Volume;
                tobB4 = _marketDepth.BidEntries[4].Volume;
            }


            tobA5Sum = tobA0 + tobA1 + tobA2 + tobA3 + tobA4;

            tobB5Sum = tobB0 + tobB1 + tobB2 + tobB3 + tobB4;


            if (tobB5Sum > tobA5Sum)
            {
                ratiobuy5 = tobB5Sum / tobA5Sum;

                if (ratiobuy5 >= 1)
                {
                    rbuyhist5 += ratiobuy5;
                    rhistdelta5 = (rbuyhist5 - rsellhist5);
                }

            }

            if (tobA5Sum > tobB5Sum)
            {
                ratiosell5 = tobA5Sum / tobB5Sum;

                if (ratiosell5 >= 1)
                {
                    rsellhist5 += ratiosell5;
                    rhistdelta5 = (rbuyhist5 - rsellhist5);

                }


            }


        }





// Trying to set the values of the following variables to 0 at the start of the new bar
// --> rbuyhist5, rsellhist5 and rhistdelta5.

        public override void Calculate(int index)
        {


            Buy5Bias[index] = rbuyhist5;

            Sell5Bias[index] = -(rsellhist5);

            DeltaFive[index] = rhistdelta5;

        }




    }
}

Any help would be highly appreciated

Cheers