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Using Draw Methods to Plot to the Future Part of the Chart


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Using Draw Methods to Plot to the Future Part of the Chart

  #1 (permalink)
Tempo
Los Angeles
 
Posts: 8 since Feb 2011
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I have a few projective approaches I'd like to test, projective in the way Fibonacci & Gann techniques are. They attempt to identify time & price points in the future that are of interest. The NinjaScript OnBarUpdate() method seems to prohibit programmatically drawing objects or plotting indicators to the future part of the chart, of whatever bar is being currently calculated. One can manually place rectangles and ellipses anywhere one desires, including the future area of the chart. Is there a way to programmatically place drawing objects to the future side (to the right) of whatever bar is being calculated, including the bar being created "now"?

I have seen some stuff on overriding the plot() method. Can that be used to programmatically draw the draw object methods like DrawRectangle(), DrawEllipse() on the future side of the chart, or does this only work for price-derivative indicators like MACD or RSI? And, does that require translating back and forth between time/price and X/Y coordinates?

Can the draw object methods themselves be overridden, so that they can take negative values for their x-axis/bars back values? They would then plot to the future. I prefer to stay with draw object methods if at all possible due to the simplicity of the arguments that they take, prices, numbers of bars, etc.

Thanks,
Tempo

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  #3 (permalink)
 
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 Fat Tails 
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Tempo View Post
I have a few projective approaches I'd like to test, projective in the way Fibonacci & Gann techniques are. They attempt to identify time & price points in the future that are of interest. The NinjaScript OnBarUpdate() method seems to prohibit programmatically drawing objects or plotting indicators to the future part of the chart, of whatever bar is being currently calculated. One can manually place rectangles and ellipses anywhere one desires, including the future area of the chart. Is there a way to programmatically place drawing objects to the future side (to the right) of whatever bar is being calculated, including the bar being created "now"?

I have seen some stuff on overriding the plot() method. Can that be used to programmatically draw the draw object methods like DrawRectangle(), DrawEllipse() on the future side of the chart, or does this only work for price-derivative indicators like MACD or RSI? And, does that require translating back and forth between time/price and X/Y coordinates?

Can the draw object methods themselves be overridden, so that they can take negative values for their x-axis/bars back values? They would then plot to the future. I prefer to stay with draw object methods if at all possible due to the simplicity of the arguments that they take, prices, numbers of bars, etc.

Thanks,
Tempo


I have at least in one case used a DrawText() method and entered a negative value for the BarsAgo parameter. This worked as the text was plotted to the right of the current bar.

Just try and see what happens.

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  #4 (permalink)
Tempo
Los Angeles
 
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Wow, Fat Tails,
That's the first time I've heard of that working. I have tried it with a rectangle before, but it did not work at the time. What version and build were you on? Tomorrow I will have time to code a test. If it works on NT7 (which is new to me) I will be thrilled, really.
Thanks for your quick reply,
Tempo

P.S. Confirmation or thoughts from others is welcome, too.

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  #5 (permalink)
 
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 Big Mike 
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Fat Tails View Post
I have at least in one case used a DrawText() method and entered a negative value for the BarsAgo parameter. This worked as the text was plotted to the right of the current bar.

Just try and see what happens.

I believe it was added in NT7.

Mike

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  #6 (permalink)
 
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 Fat Tails 
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Big Mike View Post
I believe it was added in NT7.

Mike

I have used it in that Relative Volume indicator. It plots the info at position -1 to the right of the last bar of the histogram.
You can check the code.

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  #7 (permalink)
Tempo
Los Angeles
 
Posts: 8 since Feb 2011
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Fat Tails, Mike,

Yep. Didn't work in NT6.5 (so that's why I asked), and it now works in NT7, which is great for what I'm trying to do. Thank you guys for your help.

Best,
Tempo

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Last Updated on February 24, 2011


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