Help Drawing Lines Connecting Bars (Indicator Development)

March 16th, 2016, 11:37 AM

Hi all, I'm looking for an example on how to draw a line on a bar chart for automated channel/support resistance indicators. The Vertical Line is easy, but for any other type of line, it isn't clear to me from the documentation how to ensure that a line is draw at a Y coordinate that matches the bar. Two prime examples I'm struggling with are:

1) Just draw a horizontal bar at the top of the highest bar close in the last N bars. Once I find the bar how do I get the line to draw aligned to the top of the bar and how to derive the X length from the current width of bars.

2) I want to draw a line between two bars of some number of bars apart and extending in either direction by an extra N bars.

I'm using NT8, but NT7 examples are fine too.

Thanks,

-Jason

March 29th, 2016, 02:02 PM

jmondanaro

Hi all, I'm looking for an example on how to draw a line on a bar chart for automated channel/support resistance indicators. The Vertical Line is easy, but for any other type of line, it isn't clear to me from the documentation how to ensure that a line is draw at a Y coordinate that matches the bar. Two prime examples I'm struggling with are:

1) Just draw a horizontal bar at the top of the highest bar close in the last N bars. Once I find the bar how do I get the line to draw aligned to the top of the bar and how to derive the X length from the current width of bars.

2) I want to draw a line between two bars of some number of bars apart and extending in either direction by an extra N bars.

I'm using NT8, but NT7 examples are fine too.

Thanks,

-Jason

Hello Jason,

From what I read about your issue, I have made some code in NT8 to exemplify what I gathered you need.

Code

			int x = 0;
			for(int i = 0; i <= barsBack; i++){
				if(High[x] < High[i])
					x = i;
			}
			Draw.Line(this, "line", x+barsExtend, High[x], x-10-barsExtend, High[x], Brushes.Black);

This code is for the On Bar Update part of the indicator. What this does is it looks for which bar in the last "barsBack" (this you can have as a variable) number of bars back has the highest high and records the bar number. The draw line part of the code draws a line that will be over ridden on each new draw (bar), from the bar that gave you the highest high with "barsExtend" (this is a variable of type int) to the left, the y co-ordinate of the line remains the same so you draw just a horizontal line and the second x co-ordinate is the x bar minus a variable that you can change and minus the "barsExtend" again so it extends to the right of the bar that you wanted.

Hope this helped,

Maza.

Help Drawing Lines Connecting Bars (Indicator Development)

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Help Drawing Lines Connecting Bars (Indicator Development)