Could Draw.Line() be used in for() {} sentence?

[LadGta2018]

I have a list of ZigZagLine as below. The list has StartBarNumber; EndBarNumber, StartValue, EndValue. I tried to use Draw.Line() to draw lines between these points. but the result only show the last line.

How to fix my code?




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public struct ZigZagLine
{
public int StartBarNumber;
public int EndBarNumber;
public double StartValue;
public double EndValue;
}

List<ZigZagLine> ZigZagLines = new List<ZigZagLine>();

for (int j = 0; j < ZigZagLines.Count; ++j)
{
Draw.Line(this, "j", true, ChartBars.Count-ZigZagLines[j].StartBarNumber, ZigZagLines[j].StartValue, ChartBars.Count - ZigZagLines[j].EndBarNumber, ZigZagLines[j].EndValue, Brushes.Blue, DashStyleHelper.Solid, 5);
}

[NinjaTrader_PaulH]

Hello LadGta2018,

Thanks for your post.

All draw objects must have a unique tag name to remain on the chart. When the same tag name is used, the previously draw object is automatically removed when the new object is created.

A common approach to showing all draw objects is to append CurrentBar to the chosen tag name. CurrentBar is the system bar counter so for each bar you would have a unique number. In your example this would look like:

Draw.Line(this, "j"+CurrentBar, true, ChartBars.Count-ZigZagLines[j].StartBarNumber, ZigZagLines[j].StartValue, ChartBars.Count - ZigZagLines[j].EndBarNumber, ZigZagLines[j].EndValue, Brushes.Blue, DashStyleHelper.Solid, 5);

[LadGta2018]

Hello LadGta2018,

Thanks for your post.

All draw objects must have a unique tag name to remain on the chart. When the same tag name is used, the previously draw object is automatically removed when the new object is created.

A common approach to showing all draw objects is to append CurrentBar to the chosen tag name. CurrentBar is the system bar counter so for each bar you would have a unique number. In your example this would look like:

Draw.Line(this, "j"+CurrentBar, true, ChartBars.Count-ZigZagLines[j].StartBarNumber, ZigZagLines[j].StartValue, ChartBars.Count - ZigZagLines[j].EndBarNumber, ZigZagLines[j].EndValue, Brushes.Blue, DashStyleHelper.Solid, 5);

Thanks for quick response.

Is there any other way to give a different tag name except use CurrentBar?

My second question is "j" is already a different name since j is keep changing in "for" . j will be 0, then 1, then 2, then 3.............

[NinjaTrader_PaulH]

Hello LadGta2018,

Thanks for your reply.

In your example the tag name is "j" which is a string. To use the integer counter j you would have to use j.ToString() which will convert the numerical value of the integer variable j to a string which is what the tag name field requires.

[LadGta2018]

Hello LadGta2018,

Thanks for your reply.

In your example the tag name is "j" which is a string. To use the integer counter j you would have to use j.ToString() which will convert the numerical value of the integer variable j to a string which is what the tag name field requires.

Thanks, that works well!