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I'm in touch with Ninja support since a few days about this issue.
Basically I noticed that Ask and Bid does not always update correctly from OnMarketData
Here you will find a screenshot and the matching indicator.
You can check the script is straight to basic and contains only one line of code : If(e.MarketDataType==e.MarketDataType.Ask) Values.Set(e.Price);
I noticed that bid/ ask was updating correctly only 70% of the time but from time to time would not update accordingly.
Anyone aware of this or can check my indi on his platform ?
I run :
- NT7 R7
- CQG demo (AMP futures)
- whatever instrument (FDAX, ES, 6E)
- timeframe : I guess whatever but I'm sure about 5 minute or 10 minute
- chart properties : display interval set to minimum aka 0,1
- very fast high end computer (Alienware)
Thank you
Can you help answer these questions from other members on NexusFi?
Try going to Properties | Display Update Intervel and the set the value to smallest number possible. I think it would be 0.10 but not sure. NT controls the chart draw/update so that many computers will not get overloaded. OnMarketData updates with every incoming tick.
- The chart canvas updates on the timer
- The market data values on the Chart Trader Panel updated immediately on arriving market data events
- Thus the two will not be in sync and is expected by design
Actually on the chart, ask/bid will only update if it occurs at the same time than a last price level change. If ask or bid refreshes while last price stays the same, then it won't update.
It is more of a problem when market lacks ask/bid events, that is to say less liquid instruments or at ETH/globex/night hours.
Too bad, because my use of OnMarketData then becomes kind of pointless.
To me, it sounds like a truncated design and should be corrected/updated on user's choice at least. Please suggest it to your development team.
If you scan this forum, there likely is a thread on how you can control this at your command however, this is not an officially supported approach nor do we suggest it. If you want to trigger a repaint of the chart on every change in bid/ask data, you are asking for performance issues and in fact, I would guarantee that you will lock up NinjaTrader since the sheer amound of bid/ask changes is orders of magnitude higher than last trade events.
Maybe it would not freeze running Ninja on very high-end "war" computers. Some only display one chart at a time also requiring less performance. That is why I suggested to let it user-controlled for a future release.
Anyway I'll use override plot like you suggested. Thanks again.
Override plot reacts to specific events like last price refresh, scroll movement, mouse click etc.
However, the refresh rate is not enough for me. I'd really wish to achieve a charting plot update each time bid or ask changes without waiting for the last price to update (and no other specific user-action neither)
Do you have a solution ? Simulate a fonction ? Simulate left click or scroll movement is not practical.
Any tips ???
