Let user select Candles/Bars

amusleh
02 Feb 2022, 08:33

Hi,

There are different ways to select bars, one is by mouse click event that you can use when user click on one bar and then on another bar, you can get the mouse click bar index.

You can also use Rectangle which is much better way than using mouse click event, use Chart object events like chart object added, check the rectangle Time1 and Time2 properties and change it to bar index.

Here is an example with rectangle:

using cAlgo.API;
using System.Linq;

namespace cAlgo
{
    [Indicator(IsOverlay = true, TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class CandlesSelectionWithRectangle : Indicator
    {
        protected override void Initialize()
        {
            Chart.ObjectsAdded += Chart_ObjectsAdded;
        }

        private void Chart_ObjectsAdded(ChartObjectsAddedEventArgs obj)
        {
            var chartRectangleObject = obj.ChartObjects.FirstOrDefault(chartObject => chartObject.ObjectType == ChartObjectType.Rectangle);

            if (chartRectangleObject == null) return;

            var rectangle = chartRectangleObject as ChartRectangle;

            var startTime = rectangle.Time1 < rectangle.Time2 ? rectangle.Time1 : rectangle.Time2;
            var endTime = rectangle.Time1 < rectangle.Time2 ? rectangle.Time2 : rectangle.Time1;

            var startBarIndex = Bars.OpenTimes.GetIndexByTime(startTime);
            var endBarIndex = Bars.OpenTimes.GetIndexByTime(endTime);

            Print("startBarIndex: {0} | endBarIndex: {1}", startBarIndex, endBarIndex);

            for (int barIndex = startBarIndex; barIndex <= endBarIndex; barIndex++)
            {
                var bar = Bars[barIndex];

                // do anythign you want to with the bars here
            }
        }

        public override void Calculate(int index)
        {
        }
    }
}

Create an instance of indicator on cTrader automate, draw a rectangle on your chart, check the logs tab.