Trading Order Lines

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

namespace cAlgo
{
    [Indicator(IsOverlay = true, TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class TradingOrderLines : Indicator
    {
        [Parameter("TP Color", DefaultValue = "8065FE66")]
        public string TPColor { get; set; }

        [Parameter("SL Color", DefaultValue = "80FF999A")]
        public string SLColor { get; set; }

        [Output("Main")]
        public IndicatorDataSeries Result { get; set; }

        protected override void Initialize()
        {
            PendingOrders.Cancelled += OnPendingOrdersCancelled;
            PendingOrders.Created += OnPendingOrdersCreated;
            PendingOrders.Filled += OnPendingOrdersFilled;
            PendingOrders.Modified += OnPendingOrdersModified;

            foreach (var order in PendingOrders)
            {
                DrawShapes(order);
            }
        }

        void OnPendingOrdersCancelled(PendingOrderCancelledEventArgs obj)
        {
            RemoveShapes(obj.PendingOrder);
        }

        void OnPendingOrdersCreated(PendingOrderCreatedEventArgs obj)
        {
            DrawShapes(obj.PendingOrder);
        }

        void OnPendingOrdersFilled(PendingOrderFilledEventArgs obj)
        {
            RemoveShapes(obj.PendingOrder);
        }

        void OnPendingOrdersModified(PendingOrderModifiedEventArgs obj)
        {
            DrawShapes(obj.PendingOrder);
        }

        void DrawShapes(PendingOrder order)
        {
            var start = Bars.ClosePrices.Count - 1;
            var end = start + 20;

            if (order.TakeProfit.HasValue)
            {
                var rect = Chart.DrawRectangle("TP" + order.Id, start, order.TargetPrice, end, order.TakeProfit.Value, Color.FromHex(TPColor));
                rect.IsFilled = true;
            }

            if (order.StopLoss.HasValue)
            {
                var rect = Chart.DrawRectangle("SL" + order.Id, start, order.TargetPrice, end, order.StopLoss.Value, Color.FromHex(SLColor));
                rect.IsFilled = true;
            }
        }

        void RemoveShapes(PendingOrder order)
        {
            Chart.RemoveObject("TP" + order.Id);
            Chart.RemoveObject("SL" + order.Id);
        }

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