Too Many Rays on chart

[stockgoblin]

Hi!

I have a custom indicator that draws rays between the closing prices of bars. After awhile too many rays get drawn and bog down the program. I only need to see the rays that are within a certain distance from the current closing price of the current bar. Is there a way to tell the value of a ray that was made many bars ago at the current bar and remove it if it is outside of a certain range?

Thanks for any help

[NinjaTrader_AdamP]

stockgoblin,

Yes, this is possible. Essentially you will want to modify the indicator so that it deletes rays when they do not satisfy some condition.

Here are some reference samples.

Drawing objects that update : http://www.ninjatrader.com/support/f...ead.php?t=3419

Removing objects : http://www.ninjatrader.com/support/f...ad.php?t=18995

Please let me know if I may assist further.

[stockgoblin]

Ray points

Yea, I'm just confused to how to determine the value of a ray that's already been made at the time of the current bar. The ray was made of two points in the past but how do I determine it's value at the current bar?

[NinjaTrader_AdamP]

Stockgoblin,

I am not sure what you mean. Could you please clarify?

If you store the references to your rays, these are IRay objects.

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?iray.htm

You can access parameters of the Ray, by doing for example :

IRay my_ray;

protected override void OnBarUpdate()
{
   //Code for drawing arrays, etc. somewhere you have my_ray = DrawRay( <parameters>);

Print( my_ray.Anchor1BarsAgo); //An int value representing the number of bars ago of the 1st anchor point

Print( my_ray.Anchor1Y);  //A double value representing the y value of the 1st anchor point

Print( my_ray.Anchor2BarsAgo);  //An int value representing the number of bars ago of the 2nd anchor point

Print( my_ray.Anchor2Y);  //A double value representing the y value of the 2nd anchor point

}

Please let me know if I may assist further.

[stockgoblin]

current Ray Y value

Okay,

example:

Ray made by previous 2 bars, say at Y close values of 10 and 20. So, at the next current bar the ray is at Y value 30. The close of the current bar is at say 12. I only want rays that are within say 10 of the current bar close so that ray can be removed as it's current value is above 22.

How do I determine the 30 value, the current Y value of a previous ray?

[NinjaTrader_AdamP]

Stockgoblin,

If I understand correctly, you would use :

my_ray.Anchor2Y;

Where my_ray is the previous ray drawn like :

my_ray = DrawRay( <input parameters>);

Please let me know if I may assist further.

[stockgoblin]

Ray points

Alright, I think I understand,

This is the Drawray code I use:

DrawRay("Stockline" + Time, false, barsAgo, Previouscrossclose, CurrentBar, Crossclose, CrossColor, DashStyle.Dot, lineWidth);


So each ray is tagged differently.
How would I refer to all of them?

[NinjaTrader_AdamP]

Alright, I think I understand,

This is the Drawray code I use:

DrawRay("Stockline" + Time, false, barsAgo, Previouscrossclose, CurrentBar, Crossclose, CrossColor, DashStyle.Dot, lineWidth);


So each ray is tagged differently.
How would I refer to all of them?

Stockgoblin,

I am happy to assist.

You could name each DrawRay as "Stockline"+Previouscrossclose or something more useful for referencing them, then use the RemoveDrawObject("Stockline"+Previouscrossclose); method to get rid of them

Alternatively you could store all the IRay objects in a list or something and iterate through the list to check for conditions and delete.

Here is a forum post with some references to uses of Foreach with draw objects : http://www.ninjatrader.com/support/f...ad.php?t=45776

Please let me know if I may assist further.