values and drawings + currenbar

[tonynt]

Hello,

I found in the forum how one can plot eg different lines with adding "+currentbar" to the tagname of the drawing object (eg horizontal line).

But what I didnt find and I want to ask please is how to store the values of each line so that the double can be used in conditions of the script and also the line can be removed (and double set to 0) when price crosses a drawingobject line.

Thank you!
Tony

[NinjaTrader_ChrisL]

Hello tonynt,

Thanks for the post.

It sounds like you might need a list of ILine objects.

Please see this publicly available link on C#'s List class:

https://msdn.microsoft.com/en-us/library/6sh2ey19(v=vs.110).aspx

You could do something like the following to store the values of your drawing objects, ... denotes that I have left out code:

using System.Collections.Generic;

...
public class SaveLines : Indicator{
private List<ILine> MyLineList; //Class level List object
...

protected override void Initialize(){

MyLineList = new List<ILine>();
}

protected override void OnBarUpdate() {

if(CurrentBar < 10) return;

MyLineList.Add(DrawLine("tag" + CurrentBar.ToString(), false, 10, Low[0], 0, 1001, Color.LimeGreen, DashStyle.Dot, 2));
MyLineList.Add(DrawLine("tag" + CurrentBar.ToString(), false, 10, High[0], 0, 1001, Color.Red, DashStyle.Dot, 2));

Print(MyLineList[0].StartTime);
Print(MyLineList[0].EndTime);

Print(MyLineList[1].StartTime);
Print(MyLineList[1].EndTime);

}

To remove drawing objects, use RemoveDrawObject()

https://ninjatrader.com/support/help...drawobject.htm - RemoveDrawObject()

Please let us know if we may be of any further assistance.

[tonynt]

Hello ChrisL,

thank you for your reply. I´m thinking to work with a list as I do already for other purposes.

But the core of my problem is what you mention in your last paragraph. How can I refer to a certain "tag+currentbar" to remove it? I´m using RemoveDrawObjects all the time and its working of course. But how to remove one of x-numbers with a condition? (if(Low[0]<=tag+currentbar && High[0]>=tag+currentbar) RemoveDrawObject("tag+currentbar");?

Thank you!
Tony

[NinjaTrader_ChrisL]

Hello tonynt,

Thanks for the follow-up.

You can store the tag string in a Dictionary as the key and store the IList object in the value field to create a lookup table like so :

private Dictionary < string, ILine > DrawingTable = new Dictionary < string, ILine > ();

protected override void OnBarUpdate() {
    if (CurrentBar < 11) return;

    DrawingTable.Add(tag0 + CurrentBar.ToString(), DrawLine(tag0 + CurrentBar.ToString(), true, 10, Low[10], 0, Low[0], Color.LimeGreen, DashStyle.Dot, 2));

    DrawingTable.Add(tag1 + CurrentBar.ToString(), DrawLine(tag1 + CurrentBar.ToString(), true, 10, High[10], 0, High[0], Color.Red, DashStyle.Dot, 2));

    //You need to know the tag of the line object that you need information from before this next block.


    //
    if (Low[0] <= DrawingTable[tag0 + CurrentBar.ToString()].StartY && High[0] >= DrawingTable[tag0 + CurrentBar.ToString()].StartY) {
        RemoveDrawObject(tag0 + CurrentBar.ToString());
        DrawingTable[tag0 + CurrentBar.ToString()] = null;
    }
}

Hopefully, this example will help you do what you need to.

Please see this publicly available link on the Dictionary class:

https://msdn.microsoft.com/en-us/library/xfhwa508(v=vs.110).aspx

Please let us know if we may be of any further assistance.