Vertical Bar

[vsolv]

Is it possible to draw a vertical line between 2 indicators. For example, if I have 2 moving averages on the chart and I want to draw a vertical line between them, is it possible?

I'm transitioning from traderstation and they had a feature called Paintbar which would allow me to pass a high value and a low value and it would paint a vertical bar on the chart.

Hoping someone can help.

[NinjaTrader_RyanM1]

Hi vsolv,

Yes, you could use DrawLine(), which has startY and endY inputs:

http://www.ninjatrader.com/support/helpGuides/nt7/drawline.htm

You may want to check out DrawRegion() as well. There's a sample showing how to work it between Bollinger lines here:

http://www.ninjatrader.com/support/forum/showthread.php?t=4331

[vsolv]

When using the Drawline
startY - The starting y value co-ordinate where the draw object will be drawn
EndY - The end y value co-ordinate where the draw object will be drawn

Drawline is expecting me to provide the StartY and EndY values. I'm guessing that the coordinate system is in pixels. So question is, how do I take my indicator's High and Low values and convert it to the proper Y coordinate ?

Sorry --- newbie here and just learning NScript.

[NinjaTrader_RyanM1]

StartY and EndY are the values of your moving averages. Let's say you have a 5 period and 50 period SMA. You would draw lines between them with something like this:

DrawLine("Lines" + CurrentBar, 0, SMA(5)[0], 0, SMA(50)[0], Color.Blue);

This can be a bit of a performance drain, so I would also take a look at that DrawRegion sample which can do this sort of thing with more efficiency.

[vsolv]

Apologize for these newbie questions.
In my indicator, I have 2 local variables that I'm trying to plot.
MyHigh, MyLow - these are double

I do my calculations to populate these in the indicator.

when I try to plot them as follows:

DrawLine("Lines" + CurrentBar, 0, <MyLocalVar_High>, 0, <MyLocalVar_Low>, Color.Blue);

I get the following errors:

Use of unassigned local variable MyHigh
Use of unassigned local variable MyLow


What am I doing wrong? Can someone help.

[vsolv]

Mistyped:

in my indicator I try to plot them as follows:

DrawLine("Lines" + CurrentBar, 0, <MyHigh>, 0, <MyLow>, Color.Blue);

[NinjaTrader_RyanM1]

For basic C# syntax, I would check out the following link:

http://www.ninjatrader.com/support/helpGuides/nt7/basic_syntax.htm

Example with doubles:
double myHigh = SMA(5)[0];
double myLow = Low[0];

Then refer in code with just myHigh or myLow. (no extra < or > needed)

[koganam]

Mistyped:

in my indicator I try to plot them as follows:

DrawLine("Lines" + CurrentBar, 0, <MyHigh>, 0, <MyLow>, Color.Blue);

Why the pointy brackets?

[vsolv]

Hi Kogaman and Ryan,
The pointy brackets mean nothing. I mistyped. I did not use them in my code. I come from a programming background and that is a way write pseudocode.

Anyway,
What I was trying to ask was that, in my indicator I have 2 variables that I've declared as Double in the OnBarUpdate() procedure as follows:
double MyHigh;
double MyLow;

// I did some calculations to populate MyHigh and MyLow variables
//Now what I want to do is print a vertical line between MyHigh and MyLow
//When I use the Drawline as Ryan suggested
DrawLine("Lines" + CurrentBar, 0, MyHigh, 0, MyLow, Color.Blue);

//I get the following errors:
Use of unassigned local variable MyHigh
Use of unassigned local variable MyLow

Any ideas what I'm doing wrong? From my 1 day experience with NinjaScript, it seems like it is expecting a dataseries (i.e. an array of doubles). For example if I use
DrawLine("Lines" + CurrentBar, 0, High[0], 0, Low[0], Color.Blue);
it compiles fine.

Thanks for helping.

[koganam]

Hi Kogaman and Ryan,
The pointy brackets mean nothing. I mistyped. I did not use them in my code. I come from a programming background and that is a way write pseudocode.

Anyway,
What I was trying to ask was that, in my indicator I have 2 variables that I've declared as Double in the OnBarUpdate() procedure as follows:
double MyHigh;
double MyLow;

// I did some calculations to populate MyHigh and MyLow variables
//Now what I want to do is print a vertical line between MyHigh and MyLow
//When I use the Drawline as Ryan suggested
DrawLine("Lines" + CurrentBar, 0, MyHigh, 0, MyLow, Color.Blue);

//I get the following errors:
Use of unassigned local variable MyHigh
Use of unassigned local variable MyLow

Any ideas what I'm doing wrong? From my 1 day experience with NinjaScript, it seems like it is expecting a dataseries (i.e. an array of doubles). For example if I use
DrawLine("Lines" + CurrentBar, 0, High[0], 0, Low[0], Color.Blue);
it compiles fine.

Thanks for helping.

It means what it says. You declared the variables without initializing them. Local variables must be initialized before being used in calculations. Try explicitly initializing the doubles (usually to zero).

[vsolv]

That did the trick. Thanks a lot koganam. Really appreciate it.