Drawing a Custom Line

[aligator]

The syntax for DrawLine() require "Integer" values for "startBarsAgo" and "endBarsAgo." However, I want to draw a line between two points that are fractions of a distance between two points on time axis. Thus the input for x will be a double, and if used as such an error will be generated that can not implicitly convert a double to an integer.

Some questions:

How can a double be used for x values for start and end of the line?

As an example, how this situation is coded for drawing the vertical lines for Fibonacci Time Extensions levels?

How to code converting a double to int (Math.Round...does not work, because the result is still a double)?

Thanks

[NinjaTrader_CodyB]

Hello,
Can you provide an example of what you are trying to do?
What you are wanting to accomplish may be possible using DateTIme values for the DrawLine overload.

To convert a double to an int you can do Convert.ToInt32(enter double value here);

[aligator]

Hello,
Can you provide an example of what you are trying to do?
What you are wanting to accomplish may be possible using DateTIme values for the DrawLine overload.

To convert a double to an int you can do Convert.ToInt32(enter double value here);

Thank you CodyB:

What I am trying to do is to draw Rectangle at the cross of the Fib Retracement and Time Extension Ratios. Also, drawing a line with Fib Ratio markings extended in time.

Perhaps it is easier to explain using the attached screen shot.

The problem I have is that fib ratios are doubles and the Syntax for time (x) axis will only accept integers. However, looking at your TimeExtensions Fib ratios I know it is possible to use doubles on time axis. I Just can't find a way to do that. Please take a look at the attached.

Many Thanks.

[NinjaTrader_Jesse]

Hello,

Thank you for the question.

While what you are trying to do is possible, it would not be using the standard DrawingTools. The drawing objects in NinjaTrader are specific to being locked to a BarsAgo value, what you instead seem to be looking for are specific X and Y coordinates based on Time and Price which is possible. This would allow for between the bar drawing for example.

To do this, you would instead need to use the Plot override. This is an advanced programming topic though so there is not much documentation regarding this, the best way to learn this would be from the example included.

There is a sample called CustomPlotSample in the indicators that demonstrates some basics.

You would need to use the following methods to convert values:

ChartControl.GetXByTime(Time[0]);

ChartControl.GetYByValue(this, Close[0]);

I look forward to being of further assistance.

[aligator]

Hello,
Can you provide an example of what you are trying to do?
What you are wanting to accomplish may be possible using DateTIme values for the DrawLine overload.

To convert a double to an int you can do Convert.ToInt32(enter double value here);

Thank you Cody.

Using the Convert.ToInt32(double) compiles, however it does not plot on chart.

I am using the NT7 (64). Would that be the reason for not plotting. Would the Convert plot if I use NT7 (32)?

Thanks.

[NinjaTrader_Jesse]

Hello,

If a script compiles, that does not necessarily mean it would work correctly depending on the logic you are using.

Are you getting an error? Try checking the Tools -> Output window and leave it open while you refresh the indicator.

If you are find with snapping the lines to the bars, rounding the value should work so long as the value is being rounded correctly and you have verified the output is correct.

Can you confirm if you are getting errors in the output window?

I look forward to being of further assistance.