Update of Drawing Objects

[phylum]

I'm new to Ninja, and one of my first little script projects leaves me with this problem:

The plan is to draw a horizontal line on the chart representing the current bid/ask. Ninja apparently displays last trade price for the chart bar, and occasionally bid/ask will wander away from the last trade.

I order the bid/ask lines to be drawn inside OnMarketData() event.

The lines do not seem to be drawn/redrawn unless there is a change in the last price ( a tick) on the chart.

How do I force an update of the chart when I draw/redraw a horizontal line?

[NinjaTrader_Ray]

Your observation is correct. We currently do not support forced repaints of the chart from a script.

[phylum]

Well, put it on your "things to do" list, please...

[NinjaTrader_JoshP]

Thanks for the suggestion. We will add it to the list for you.

[johanps68]

Has that "to-do-item" been done yet?
I've come across the same issue when calling DrawText() from within OnMarketData(). The chart doesn't update unless there's a new Tick coming in.
I'm using 7.0.1000.9...

[NinjaTrader_Bertrand]

johanps68, welcome to our forums - that item is still active on our feedback list for future consideration, I've added your vote in here as well.

[johanps68]

Actually, I found a way around this; the solution is to mimic the tricks in the BarTimer indicator. In essence, introduce a timer, trigger a custom event in the TimerEventProcessor() method, and then call
ChartControl.ChartPanel.Invalidate();
from within the custom event handler...

[raffu]

Hi johan, phylum,

I just made a simple indicator, which shows current bid/ask level and updates if those are updated regardless tick data (based to Johan's hint). The PVBidAsk indicator is downloadable free of charge from http://pvoodoo.com/IndicatorList.html