Market Hours

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 MarketHours : Indicator
    {
        private string[] hours = new string[24];
        private TimeSpan offset = DateTime.Now.Subtract(DateTime.UtcNow);
        private int sync = -1;
        private Colors color;

        protected override void Initialize()
        {
            SetHours();
            Timer.Start(TimeSpan.FromMilliseconds(1));
        }

        protected override void OnTimer()
        {
            DateTime utc = DateTime.UtcNow;
            int vLine = 240 - (utc.AddHours(3).Hour * 10 + utc.Minute / 6);

            for (int i = 0; i <= 4; i++)
            {
                int shift = 0;
                for (int h = 1; h <= 24; h++)
                {
                    if (i == 0)
                    {
                        color = Colors.DimGray;

                        if (shift + 10 >= vLine && vLine > shift)
                            color = Colors.LimeGreen;
                    }
                    else
                    {
                        color = Colors.Gainsboro;

                        if (i == 1)
                            if (240 > shift && shift >= 150)
                                if (240 >= vLine && vLine > 150)
                                    color = Colors.Orange;
                                else
                                    color = Colors.BurlyWood;

                        if (i == 2)
                            if (220 > shift && shift >= 130)
                                if (220 >= vLine && vLine > 130)
                                    color = Colors.YellowGreen;
                                else
                                    color = Colors.LightGreen;

                        if (i == 3)
                            if (140 > shift && shift >= 50)
                                if (140 >= vLine && vLine > 50)
                                    color = Colors.DodgerBlue;
                                else
                                    color = Colors.LightBlue;

                        if (i == 4)
                            if (90 > shift && shift >= 0)
                                if (90 >= vLine && vLine > 0)
                                    color = Colors.DeepPink;
                                else
                                    color = Colors.LightPink;
                    }
                    ChartObjects.DrawText("background" + h + i, y(i) + (char)9609 + x(shift + 5), StaticPosition.TopRight, color);

                    int hour = (21 - h + offset.Hours);
                    hour = hour >= 24 ? hour - 24 : hour < 0 ? hour + 24 : hour;

                    color = Colors.White;
                    ChartObjects.DrawText("hour" + h, hours[hour] + x(shift + 6), StaticPosition.TopRight, color);

                    shift += 10;
                }
            }

            string sydney = "" + (char)42801 + (char)655 + (char)7429 + (char)628 + (char)7431 + (char)655;
            string tokyo = "" + (char)7451 + (char)7439 + (char)7435 + (char)655 + (char)7439;
            string london = "" + (char)671 + (char)7439 + (char)628 + (char)7429 + (char)7439 + (char)628;
            string newyork = "" + (char)628 + (char)7431 + (char)7457 + " " + (char)655 + (char)7439 + (char)640 + (char)7435;

            ChartObjects.DrawText("Sydney", y(1) + sydney + x(182), StaticPosition.TopRight, color);
            ChartObjects.DrawText("Tokyo", y(2) + tokyo + x(165), StaticPosition.TopRight, color);
            ChartObjects.DrawText("London", y(3) + london + x(80), StaticPosition.TopRight, color);
            ChartObjects.DrawText("New York", y(4) + newyork + x(26), StaticPosition.TopRight, color);

            color = Colors.LimeGreen;
            for (int i = 1; i <= 4; i++)
            {
                ChartObjects.DrawText("vLine" + i, y(i) + (char)9474 + x(vLine), StaticPosition.TopRight, color);
            }

            if (sync < 1)
            {
                Timer.Stop();
                TimeSpan interval;

                if (sync < 0)
                {
                    var nextUpdate = new DateTime(utc.Year, utc.Month, utc.Day, utc.Hour, (utc.Minute / 6 + 1) * 6, 2);
                    var difference = nextUpdate.Subtract(utc);

                    interval = difference;
                    Timer.Start(interval);
                    sync = 0;
                }
                else
                {
                    interval = TimeSpan.FromMinutes(6);
                    Timer.Start(interval);
                    sync = 1;
                }
            }
        }

        public override void Calculate(int index)
        {
            // Do nothing.
        }

        private string x(int count)
        {
            return new string((char)8202, count);
        }

        private string y(int count)
        {
            return new string('\v', count);
        }

        private void SetHours()
        {
            for (int i = 0; i <= 23; i++)
            {
                if (i <= 9)
                {
                    hours[i] = "" + (char)(8320 + i) + x(2);
                }
                else if (i <= 19)
                {
                    hours[i] = "" + (char)8321 + (char)(8310 + i);
                }
                else
                {
                    hours[i] = "" + (char)8322 + (char)(8300 + i);
                }
            }
        }
    }
}