Replay vs Live error

[safetrading]

I have an indicator I've built which works fine with my Live Zenfire data feed, but when I connect to Playback, the indicator causes a "Object reference not set to an instance of object" error.

I would prefer not to post the code publicly. Is there a way I can get assistance with this error?

Thanks,

Safetrading

[NinjaTrader_Lance]

You will want to ensure you do a CurrentBar check at the start to prevent the null reference. This will stop it from trying to reference data that isn't yet loaded onto the chart.

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?currentbar.htm

if working with a multi series indicator:

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?currentbars.htm

[safetrading]

Thanks, but I have that in place. My indicator only looks 9 bars back, so I added this as the first line in OnBarUpdate;
if(CurrentBar < 10)return;

Any other thoughts?

[NinjaTrader_Lance]

I would suggest increasing this to a large number like 50 or 100 to test.

If you still receive this error:

Your NinjaScript / C# Code will always be logically processed and evaluate according to your set logic – this can of course lead to unexpected results at times, thus we would suggest to simplify and debug your code to better understand the event sequence it would go through - if you provide me with a sample script that replicates this error I can look into it but if requires in depth debugging unfortunately we cannot offer such debug or code modification services here, but please see the provided resources below to help you proceed productively :

First of all you would want to use Print() statements to verify values are what you expect - Debugging your NinjaScript code.

It may also help to add drawing objects to your chart for signal and condition confirmation - Drawing Objects.

If you would prefer the debug assist of a professional NinjaScript consultant, please check into the following listings - Click here for a list of certified NinjaScript Consultants

[safetrading]

I tried extending the CurrentBar look back, but that didn't help. Here is a piece of the code that NT seems to have issue with;

if(CurrentBar < 10)return;

if( Closes[1][0] < Opens[1][0] && Closes[1][1] < Opens[1][1] && Closes[1][2] < Opens[1][2]
||
Closes[1][0] > Opens[1][0] && Closes[1][1] > Opens[1][1] && Closes[1][2] < Opens[1][2] && (Closes[1][0]-Lows[1][0])/(Highs[1][0]-Lows[1][0]) >= 0.67
||
Closes[1][0] > Opens[1][0] && Closes[1][1] < Opens[1][1] && Closes[1][2] < Opens[1][2] && (Closes[1][0]-Lows[1][0])/(Highs[1][0]-Lows[1][0]) >= 0.67)
{
// do something
}

Thanks for your help.

[NinjaTrader_Lance]

When working with multi series like this you have to use CurrentBars

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?currentbars.htm

Example if you had 3 series

// Checks to ensure all Bars objects contain enough bars before beginning
    if (CurrentBars[0] <= BarsRequired || CurrentBars[1] <= BarsRequired || CurrentBars[2] <= BarsRequired)
        return;

[safetrading]

Thanks a lot, that did it. I'll be sure to add this to my notes. Have a great day.