Need to draw a dot above certain bars

December 15th, 2010, 06:29 AM

I'm trying to draw a Dot above/below really large price bars on a 5 minute chart to help me identify a pattern of divergence on my smaller time frame chart. The problem is that it only draws the dot on the last big bar. I'd like it to leave the dot on ALL past big bars as I have other indicators that also change the bar color.

Code

#region Using declarations
using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Xml.Serialization;
using NinjaTrader.Cbi;
using NinjaTrader.Data;
using NinjaTrader.Gui.Chart;
#endregion

// This namespace holds all indicators and is required. Do not change it.
namespace NinjaTrader.Indicator
{
    /// <summary>
    /// Alerts you to really large price bars
    /// </summary>
    [Description("Alerts you to really large price bars")]
    public class BigBarAlert : Indicator
    {
        #region Variables
            private int myBigBar = 50; // Default setting for MyInput0
            private int LastBarSize=0; // what's the size of the bar from hi to low.
            private string myAlert="alert1.wav"; // The alert wav file
            private bool myAudibleAlert=false;  //Whether to play the sound file
            private bool myPopUpAlert=false; //Whether to pop up an alert window
            private bool myChangeBarColor=true; //Whether to change big bar to gold
            private int myBarDirection=0; //0= Open/Close the same, -1 Close is below open, 1 Close is above Open 
        #endregion

        /// <summary>
        /// This method is used to configure the indicator and is called once before any bar data is loaded.
        /// </summary>
        protected override void Initialize()
        {
            Overlay                = true;
        }

        /// <summary>
        /// Called on each bar update event (incoming tick)
        /// </summary>
        protected override void OnBarUpdate()
        {

            LastBarSize = (int)((High[0]-Low[0]) / TickSize); // gets range of bar and converts it to ticks for each market

            if (LastBarSize >= myBigBar) 
            {
            
                if (Close[0] > Open[0]) 
                { 
                    myBarDirection=1;
                } else if (Close[0] < Open[0]) 
                { 
                    myBarDirection=-1;
                } else {
                    myBarDirection=0;
                }
                
                if (myBarDirection==1) 
                {
                    DrawDot("BigBarDot",true, 0, High[0] + (TickSize * 5),Color.Gold);
                } else if (myBarDirection==-1)
                {
                    DrawDot("BigBarDot",true, 0, Low[0] - (TickSize * 5),Color.Gold);    
                }
                
                if (myChangeBarColor)
                {
                    BarColor = Color.Gold;
                }
                
                if (myAudibleAlert)
                {
                    PlaySound(@"C:\Program Files\NinjaTrader 7\sounds\" + myAlert);
                    // Print ("Play alert file" + LastBarSize.ToString() );
                    
                }
            }
        }

        #region Properties
        [XmlIgnore()]        // this line ensures that the indicator can be saved/recovered as part of a chart template, do not remove
        
        
        
        [Description("Big Bar in ticks, 100 max")]
        [GridCategory("Parameters")]
        public int Big_Bar
        {
            get { return myBigBar; }
            set { myBigBar = Math.Max(1, value); }
        }
        
        [Description("Alert via sound")]
        [GridCategory("Parameters")]
        public bool Audible_Alert
        {
            get { return myAudibleAlert; }
            set { myAudibleAlert = value; }
        }
        
        [Description("Alert sound file")]
        [GridCategory("Parameters")]
        public string Audible_Alert_File
        {
            get { return myAlert; }
            set { myAlert = value; }
        }
        
        [Description("Change the big bar's color")]
        [GridCategory("Parameters")]
        public bool Change_Bar_Color
        {
            get { return myChangeBarColor; }
            set { myChangeBarColor = value; }
        }
        #endregion
        
    }
}

I have tried using a Plot instead but that seems to be something you only want to do for each and every bar. Any help from the gurus is greatly appreciated.

December 15th, 2010, 08:30 AM

You must give all of your Drawing Objects a unique name. Try changing:

Code

                            
DrawDot("BigBarDot",true, 0, High[0] + (TickSize * 5),Color.Gold);

To:

Code

                            
DrawDot(CurrentBar.ToString() + "BigBarDot",true, 0, High[0] + (TickSize * 5),Color.Gold);