Current price

Modified on Fri, 04 Aug 2023 at 01:53 PM

Example of an indicator which displays the current price and current time in the chart

[DisplayName("Current price")]

    public class CurrentPrice : Indicator

        RenderFont _font = new RenderFont("Roboto", 14);

        private Color _background = Color.Blue;

        private Color _textColor = Color.AliceBlue;

        private RenderStringFormat _stringFormat=new RenderStringFormat() { LineAlignment = StringAlignment.Center, Alignment = StringAlignment.Far };

        public System.Windows.Media.Color Background

            get => _background.Convert();

            set => _background = value.Convert();

        public System.Windows.Media.Color TextColor

            get => _textColor.Convert();

            set => _textColor = value.Convert();

        public float FontSize

            get => _font.Size;

set

                if (value < 5)

                    return;

                _font = new RenderFont("Roboto", value);

        public bool ShowTime { get; set; } = true;

        public string TimeFormat { get; set; } = "HH:mm:ss";

        public CurrentPrice():base(true)

            SubscribeToDrawingEvents(DrawingLayouts.Final);

            EnableCustomDrawing = true;

            DataSeries[0].IsHidden = true;

        #region Overrides of BaseIndicator

        protected override void OnCalculate(int bar, decimal value)

        #endregion

        protected override void OnRender(RenderContext context, DrawingLayouts layout)

            if (LastVisibleBarNumber != CurrentBar - 1)

                return;

            var candle = GetCandle(LastVisibleBarNumber);

            var priceString = candle.Close.ToString();

            var size = context.MeasureString(priceString, _font);

            var x = (int)(ChartInfo.GetXByBar(LastVisibleBarNumber) + ChartInfo.PriceChartContainer.BarsWidth);

            var y = ChartInfo.GetYByPrice(candle.Close, false);

            var rectangle = new Rectangle(x + 10, y - (int)size.Height / 2, (int)size.Width + 10, (int)size.Height);

            var points = new List<point>

                new Point(x, y),

                new Point(rectangle.X, rectangle.Y),

                new Point(rectangle.X + rectangle.Width, rectangle.Y),

                new Point(rectangle.X + rectangle.Width, rectangle.Y + rectangle.Height),

                new Point(rectangle.X, rectangle.Y + rectangle.Height),

};

            context.FillPolygon(_background, points.ToArray());

            rectangle.Y++;

            context.DrawString(priceString, _font, _textColor, rectangle, _stringFormat);

            if (ShowTime)

                var time = DateTime.Now.ToString(TimeFormat);

                size = context.MeasureString(time, _font);

                context.DrawString(time, _font, _textColor, rectangle.X + rectangle.Width - size.Width, rectangle.Y - size.Height);