Help Requested Re Variable Persistence

[Zeos6]

Hi ,

Please excuse me if this is a simple question. I have searched the forum but have not found any answers related to what I am looking for. If anyone would be kind enough to either suggest an answer or direct me to where I might be able to find an answer, I would greatly appreciate it. Thank you very much.

I have an indicator that uses DrawLine to drawlines. I want to change the tag of each line so that I get the historical lines to remain on the chart. Currently I have a variable, int lineID, which I convert to a string to create a unique tag; i.e Convert.ToString(lineID).
I am not sure this will work because I have to initialize the lineID variable, int lineID = 0;, and therefore I don't know how to persist it so that it is not reset to zero.

[NinjaTrader_JoshP]

Zeos6,

You can just run a counter variable as your tag.

In Variables region

private int counter = 0;

In OnBarUpdate()

DrawLine(counter.ToString(),..some other parameters..);
counter++;

[Zeos6]

Thank you very much. I really appreciate it.

One more question if I may...
I have the following line

DrawLine("r"+counter.ToString, ....

and I am getting an error message that the + operand cannot be applied to operands of type "string" and "method group"

I thought the + was overloaded in C# to allow concatenation of strings.

Thank you.

Zeos6,

You can just run a counter variable as your tag.

In Variables region

private int counter = 0;

In OnBarUpdate()

DrawLine(counter.ToString(),..some other parameters..);
counter++;

[NinjaTrader_JoshP]

ToString requires parenthesis at the end of them. It is ToString().

[Zeos6]

Thank you very much. I feel so dense. I completely missed that.
I truly appreciate your help but one final question....I apologize in advance for taking up your time and inconveniencing you. Thank you very much for all your help.

I am trying to draw two lines:

DrawLine("r"+counter.ToString(), ...
DrawLine("f"+counter.ToString(), ...

If I have only one DrawLine("r"+counter.ToString(),... the line is drawn.
If I use both DrawLine statements, as shown above, nothing gets plotted.
I am confused. Can you only use one DrawLine at a time?

ToString requires parenthesis at the end of them. It is ToString().

[NinjaTrader_JoshP]

No problem at all. That is what we are here for.

No, you can use as many DrawLine()s as you want. What I suggest is you to check your Log tab for runtime errors. You might have drawn it to an invalid bar index thus causing errors which results in nothing being drawn.

[Zeos6]

Thank you.

No problem at all. That is what we are here for.

No, you can use as many DrawLine()s as you want. What I suggest is you to check your Log tab for runtime errors. You might have drawn it to an invalid bar index thus causing errors which results in nothing being drawn.