Sim Account data not synching each time Ninjatrader is restarted.

[ajadams]

Greetings,

New user here, just getting used to Ninjatrader 8 and running SIM101. There is one annoying thing though, each time NT is started (even after a minute being closed) it does not synch with the previous sessions data. So what I'm seeing is not a continuation of the days trading data but a new range of prices on all charts that were running; ie ES, YM, NQ. Each chart appears blank until the next bar is displayed, then populates from there. I can compress the chart data and the previous session's bars are down below (which looks like a flat line of dashes). The prices are not matching the real time prices seen elsewhere. Sometimes the prices are off by a significant amount

This has happened every time NT is started.

Is this a quirk with the SIM account? Is there a fix? Or should I not restarted the program?

[NinjaTrader_Marco]

Hello,

Thanks for posting to the forums.

As ticks come into NinjaTrader in real-time, they are time stamped based on your local PC time if they do not already have an associated time stamp that is provided from the real-time data source. NinjaTrader then builds bars based on the time stamp of the incoming tick and displays these bars in your chart in real-time.


Let's say you have a tick (tick "A") with a time stamp of 10:31:00 AM which gets packaged into the 10:32:00 AM bar and happens to be the high of that bar. An hour later, you reload historical data from your historical data provider into NinjaTrader. This process will overwrite the existing data. The 10:32:00 AM bar now looks different since the high made by TICK "A" is now part of the prior bar, 10:31:00 AM. How is this possible?

•	Your PC clock could have been off so the time stamp is delayed

•	Your internet may have been lagging so the tick came in slightly delayed and therefore the time stamp is delayed

•	Due to standard latency, even 50ms delay (which is normal) could be the difference between a 10:30:59 and 10:31:00 time stamp

•	There is no way of knowing how the historical data provider packages their bars

The only way to ensure that data always looks the same is if every connectivity provider sent ticks with time stamps AND that all vendors synchronized on time stamps. Unfortunately, this is just not a reality nor plausible scenario.

Please let me know if I may be of further assistance.