EasyLanguage to NinjaScript

[RobinT]

I am converting a large app from EL to c# for NT. So far so good, but I have questions I would like help with:

Where can I find environment variables for the whole NT system and the chart the indicator is applied to. I would like things like chart resolution so I can work out spacing for my lines, and license key details for security purposes.

I use the Forms class to create new windows output screens. How do I get rid of old windows when the software restarts or when the NT app closes. I keep building up a number of windows, one each time I run the indicator. I think dispose or destroy might do it but I don't know how to call on NT close.

[NinjaTrader_PatrickH]

Hello RobinT,

Thank you for your post and welcome to the NinjaTrader Support Forum!

Are you building in NinjaTrader 7 or 8? In NinjaTrader 7 most of the items you are asking about are unsupported. In NinjaTrader 8, these items would be supported though.

For NinjaTrader 7 you would use GetMinMaxValues for the chart scale. For example:

		public override void GetMinMaxValues(Gui.Chart.ChartControl chartControl, ref double min, ref double max)
		{
			base.GetMinMaxValues(chartControl, ref min, ref max); 
			min = -20; 
			max = 120; 
		}

You can find an example on creating and disposing a custom form at the following link: http://www.ninjatrader.com/support/f...d=4&linkid=475

Keep in mind these items are unsupported in NinjaTrader 7.

In NinjaTrader 8 you would use the AddOns class for the window: http://ninjatrader.com/support/helpG...-us/add_on.htm
For the chart scale you would use chart scale, literally: http://ninjatrader.com/support/helpG...chartscale.htm

[RobinT]

I am using NT7 as I thought writing for NT8 might be premature. Is that right? Should I use NT8 now

[RobinT]

ps,thanks for the reply.

[NinjaTrader_PatrickH]

RobinT,

It is up to you. NinjaTrader 8 is still in beta. I just wanted to provide you with both options.

[RobinT]

Array

I use a multi dimensional array, 50 rows each 6 columns. I only need to sort descending on the first column so I have a sorted array on the first column with all the other data still related to column1. Does anyone know how to sort a decimal array like this or should I use another ninjascript data structure.

.private decimal [,] Htargets = new decimal [depth , arrsize ] ;

arrsize = 50 ;
depth = 6 ;

I only want to sort descending on depth = 1 ;

[NinjaTrader_PatrickH]

Hello RobinT,

I would take a look at the information at the following link at StackOverflow: http://stackoverflow.com/questions/2...nal-array-in-c

[RobinT]

Thanks, I wrote my own quicksort algo in the end.

[RobinT]

If someone could point me to posts about line drawing, I would be grateful.

[NinjaTrader_PatrickH]

RobinT,

I think what you are looking for would be under Tools > Edit NinjaScript > CustomPlotSample.

[RobinT]

I am looking for a Horizontal line from a start point and extends right as time progresses. I can use:

Drawline (

and set the endtime to DateTime.Now on every bar

is there a way of using DrawExtendedLine ( and have it not extend left as I dont want that.

[RobinT]

would I be correct in thinking a Ray does what I want and when I am finished with the line I can convert it into a Drawline (). It says a ray extend in one direction, but it doesn't say which direction.

[RobinT]

I have a number of Rays, each with its own unique tag, "TL01", "TL99" etc. Once these are plotted how do I get and change the parameters using the tag. I want to get the Startdate and I want to change the color.

[RobinT]

also if I have multiple charts, how do I get data from multiple data streams.

[RobinT]

Where can I find a list of programmable properties like:

HorizontalGridLines = false;