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Old 05-16-2018, 02:19 AM   #1
kiss987
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Default Price crossing a line

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Is there a way to know if the current price crossed a line which was drawn by gui or from Draw.Line?

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Old 05-16-2018, 07:33 AM   #2
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Hello kiss987,

Thanks for your post.

Yes, you would need to loop through a collection of draw objects and determine which line(s) you wanted to check the price against, obtain the anchor prices of the line and compare price to the anchor price.

Please see this section of the helpguide for sorting through a draw objects collection: https://ninjatrader.com/support/help...rawobjects.htm
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Old 05-16-2018, 04:16 PM   #3
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Assuming the object named "draw" of type DrawingTools.Line is my line, how do I know its value at barsAgo = 0 (current time)?

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Old 05-17-2018, 07:05 AM   #4
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Hello kiss987,

Thanks for your reply.

If the line is a horizontal line type then you would only need the start anchor price as the price level does not change for the length of the line

If the line is a line (which can be of any length and any direction) then you would need to obtain the Start anchor price and bar and the end anchor price and bar, then extend mathematically a projection of the line to the current bar to then calculate the lines price at that bar.
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Old 05-17-2018, 02:22 PM   #5
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Hello

How can I extend mathematically a projection of the line (which can be of any length and any direction) to the current bar to then calculate the lines price at that bar?

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Old 05-17-2018, 02:29 PM   #6
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Hello kiss987,

Thanks for your reply.

You would determine the slope of the line based on the start and end anchor bars and the start and end anchor prices and then use the slope to project what the Y value would be at X location.

I've attached an example script that draws a ray (for visual purposes) then calculates its slope and projects where the Y value would be for each subsequent bar by plotting a dot on the ray.
Attached Files
File Type: zip yAxisProjectionOfLine.zip (1.8 KB, 5 views)
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