Onrender for all days loaded

[BeachTrader11807]

Hello, I am building an indicator that draws a horizontal line at the bottom of the screen to highlight a specific 30 minute period of time.

my question is, how do I make it render not just on the current day but, for every day loaded. Or at least say the last 10 days.

I look forward to the help, let me know if there is any other information that is needed.

cheers!

beach trader

[NinjaTrader_ChelseaB]

Hello beach trader,

When using Draw.HorizontalLine() this will draw across the entire chart.

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

If you want to draw a line over 10 days, you would need to use Draw.Line() and provide the barsAgo value for the starting point and the barsAgo for the ending point.

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

However, you have mentioned OnRender() in the subject, which might imply you are custom rendering a line with RenderTarget.DrawLine().

https://ninjatrader.com/support/helpGuides/nt8/sharpdx_direct2d1_rendertarget_drawline.htm

The rendered line should be rendered when the starting bar and ending bar are within or overlapping the ChartBars.FromIndex and ChartBars.ToIndex.
If the starting bar is less than the ChartBars.FromIndex and the end bar is greater than ChartBars.ToIndex, some of the line would be rendered, and the x value of the vector2 of the start point would be 0 (the left of the chart).
If the starting bar is greater than ChartBars.FromIndex and is less than ChartBars.ToIndex, some of the line would be rendered but would use the x value of the corresponding bar.
If the ending bar is less than ChartBars.ToIndex the x value of the vector2 for the end point would be the corresponding bar, if the ending bar is greater than ChartBars.ToIndex the x value of the vector2 would be set to the width of the chart.

Below is a link to an example of a custom rendered scrollable line.

https://ninjatrader.com/support/forum/forum/ninjatrader-8/indicator-development/97796-how-to-anchor-grid-control-to-chart?p=786906#post786906

[BeachTrader11807]

Thank you NinjaTrader_ChelseaB, I will put the scrollable line to use perhaps on another project.

I am using onrender() to draw my line and using getxbytime for my co-ordinates.

my problem is it only draws on the current day, how do I get it to draw for all days loaded?

[NinjaTrader_ChelseaB]

Hello BeachTrader11807,

This would be based on the bar number you've chosen as the start point.

Is the start bar from a previous day?