Help writing a simple indicator

[Bob-Habanai]

Hi,

What I want is for Ninja to:

Bar1 = (High[1] - Low[1]) / TickSize;
Bar2 = (High[2] - Low[2]) / TickSize;
Bar3 = (High[3] - Low[3]) / TickSize;​
MultipleBars1-3 = (Bar1 + Bar2 + Bar3) / 3;

And

Bar2     =  (High[2] - Low[2]) / TickSize;
Bar3     =  (High[3] - Low[3]) / TickSize;            
Bar4     =  (High[4] - Low[4]) / TickSize;
MultipleBars2-4    =    (Bar2 + Bar3 + Bar4) / 3;

And display those two average price figures (MultipleBars1-3 & MultipleBars2-4) on the left size on the chart. e.g.
Average Price:
19
25

And for them to update an recalculate everytime a bar closes.

Any suggestions/help would be really appreciated,
thanks!

[NinjaTrader_Emily]

Hello Bob-Habanai,

Thank you for your post.

You should be able to achieve this by using variables declared at the class level for the four different bars and the two multiples. You could then use the Draw.TextFixed() method to draw text in a specific location on the chart, such as BottomLeft or TopLeft. Here is the help guide page for Draw.TextFixed():

https://ninjatrader.com/support/helpGuides/nt8/draw_textfixed.htm

If you keep the same tag for the drawing tool, then each time the tag is used the same draw object will be modified. This way, if the values are updated in OnBarUpdate and the indicator is set to calculate OnBarClose, the averages will be re-calculated on each bar close and update the existing fixed text drawing tool.

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

[Bob-Habanai]

Thank you Emily for your reply,

I was able to get a single number to display at the bottom left.

Draw.TextFixed(this, "AveragePrice", Math.Round(MultipleBars, 0).ToString(), TextPosition.BottomLeft, Brushes.AntiqueWhite, EfficiencyFont, Brushes.Blue, Brushes.Black, 0);

But I don't know how to get the other number to display below or above it?

Thanks.

[NinjaTrader_Emily]

Hello Bob-Habanai,

Thank you for your reply.

You may add \n to a string to indicate a new line. For example, if I were to use the following draw method in a script:

Draw.TextFixed(this, "tag", "test\ntest2\ntest3", TextPosition.BottomLeft, false, "");

The text would show on the bottom left of the chart like this:

test
test2
test3

Screenshot: https://www.screencast.com/t/nfbAprqh

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

[Bob-Habanai]

Thanks Emily,

That's helpful, but how do you do that with strings?

Here's two things I want to do, but am unsure how:

1:
Draw.TextFixed(this, "tag", MyNumberString"×".ToString(myDoubleFormat), TextPosition.BottomLeft, false, "");
In that one, I want Ninja to calculate a number then add × to it.

and 2:
Draw.TextFixed(this, "tag", MyNumberString\nMyOtherString.ToString(myDoubleFor mat), TextPosition.BottomLeft, false, "");
In this one I want to have two strings appear one on top of the other.

Thanks again for your help!

[NinjaTrader_Emily]

Hello Bob-Habanai,

Thank you for your reply.

You should be able to concatenate strings with the + operator or you could use the String.Format() method to convert the objects into strings and insert them into the string. For more information, please see the following publicly available link from the Microsoft website:

https://learn.microsoft.com/en-us/dotnet/api/system.string.format?view=netframework-4.8

Here are a couple of examples that would print in the same way and add the same line breaks, just with different formatting:

Print(Time[0] + "\n" + myDouble + "\nTest String 1");

vs.

Print(String.Format("{0}\n{1}\nTest String 2", Time[0], myDouble));

To apply this to your example, it could look something like this:

MyNumberString"×".ToString(myDoubleFormat)

MyNumberString + "×​"

or

String.Format("{0}×", MyNumberString)​

MyNumberString\nMyOtherString.ToString(myDoubleFor mat)

MyNumberString + "\n" + MyOtherString​

or

String.Format("{0}\n{1}", MyNumberString, MyOtherString)

Please let me know if I may be of further assistance.