Candle

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

namespace cAlgo.Indicators
{
    [Indicator("Candle Of Time Period", IsOverlay = true, AccessRights = AccessRights.None)]
    public class Candle : Indicator
    {
//-------------------------------------------------------------------------------------------------------------------------------------------------- 
        [Parameter("Width", DefaultValue = 10)]
        public int CandleWidth { get; set; }

        [Parameter("Offset", DefaultValue = 2)]
        public int Offset { get; set; }

        [Parameter("Period", DefaultValue = 50)]
        public int Period { get; set; }

        [Parameter("Down color", DefaultValue = "DarkGray")]
        public string DownColor { get; set; }

        [Parameter("Up color", DefaultValue = "White")]
        public string UpColor { get; set; }

        private Colors _upColor;
        private Colors _downColor;

        private bool _incorrectColors;
        private Random _random = new Random();
//-------------------------------------------------------------------------------------------------------------------------------------------------- 
        protected override void Initialize()
        {
            if (!Enum.TryParse<Colors>(UpColor, out _upColor) || !Enum.TryParse<Colors>(DownColor, out _downColor))
                _incorrectColors = true;
        }
//-------------------------------------------------------------------------------------------------------------------------------------------------- 
        public override void Calculate(int index)
        {
            if (_incorrectColors)
            {
                var errorColor = _random.Next(2) == 0 ? Colors.Red : Colors.White;
                ChartObjects.DrawText("Error", "Incorrect colors", StaticPosition.Center, errorColor);
                return;
            }

            var color = MarketSeries.Open[index - Period + 1] < MarketSeries.Close[index] ? _upColor : _downColor;


            ChartObjects.DrawLine("Line", index + Offset, Functions.Minimum(MarketSeries.Low, Period), index + Offset, Functions.Maximum(MarketSeries.High, Period), color, 1, LineStyle.Solid);
            ChartObjects.DrawLine("Body", index + Offset, MarketSeries.Open[index - Period + 1], index + Offset, MarketSeries.Close[index], color, CandleWidth, LineStyle.Solid);
        }
    }
}