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

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.