DrawLine - irratic behaviour

[FREEN]

When this regression line is drawn at historic bars (inclusive start) outside the bounds of the screen, it appears/disappears irraticaly when scrolling. Can´t find the logic causing this. Help appreciated!

(Method enclosed)

[NinjaTrader_RileyS]

Hello FREEN,

Thank you for your post.

For clarification, what interval-type of chart are you using? Are the regression lines NinjaTrader's default drawing lines or a 3rd party add-on?

[FREEN]

Minutes - tried 1, 10, 30 min. It´s the DrawLine() method included in default NinjaScript.

[NinjaTrader_PaulH]

Hello Freen,

Thanks for your reply.

I believe you have found the limitation as far as distant drawing object anchor points go, the object would disappear with anchor points too far spread out, as you scroll the chart when one anchor point or the other comes closer the line reappears. This behavior is known in NinjaTrader 7. We have checked and tested for this in our next major release Ninjatrader 8.

[FREEN]

No worries as long as there´s no calculus misbehaviours in NinjaScript. Thanks!

[FREEN]

Hmm... I don´t get it. These lines are only a few bars apart. Timescrolling shouldn´t execute indicator code, so I don´t get what´s wrong. Any other idea on what´s going wrong? The red lines are DrawLine() objects, the blue is a DrawRay() object.

Zipped MP4 enclosed.

[NinjaTrader_PaulH]

Hello FREEN,

Thanks for your post.

What is interesting about the video is that the indicator name and parameters disappear and reappear with the lines.

This may not be the same issue.

Is the indicator publicly/freely available?

[FREEN]

No, this is coded by me. No error in output window.

If I change the autoscale argument to "true" even the price data disappears/reappears and the chart defaults to an empty minimal (0.01) scale at the errorous spots.

If I remove the DrawLine() method from the code, this will alone cure the problem and all other draw objects will show as expected.

[NinjaTrader_PaulH]

Hello Freen,

Thanks for your reply.

I've tried a number of tests with your code from the first post and have not been able to recreate the condition that is observable in your video. I am able to recreate the condition i mentioned where the draw object is wider than the chart and in that case the object will appear and disappear as I scroll through the chart however the indicator name text, in the upper left corner, remains on the charts whilst yours does not.

I would like to review your log and trace files and if possible the full code for the indicator so I could recreate here. Please send to [email protected] atten: paul and a link to this thread.