Script runs to a point...

[Sleeping Troll]

In this line:

StudyBar = GetBar(Time[0].AddMinutes(-30));

an interesting thing can happen, if I am using a tick series... if there are no ticks for 30 minutes the line will create an error: "Object reference not set to an instance of an object"

I understand why the error occurs, my problem is how to get around it... Any suggestions?

[NinjaTrader_Austin]

Sleeping Troll, you will need to check how much time there is between the bar you're currently running calculations on and the first bar. If that value is greater than 30 minutes, you can run that bit of code. If the value is less than 30 minutes, just skip it for now until there are enough bars.

There is a reference sample that deals with manipulating time that you will probably find useful.

[Sleeping Troll]

Thx Austin, haven't used Time Date this much since CPM and Dbase!

[Sleeping Troll]

Every which way but loose on this!

        protected override void OnBarUpdate()
        {
			if(DateTime.Compare(Time[0].AddMinutes(-30),Time[1]) != 1)
			{
				StudyBar = GetBar(Time[0].AddMinutes(-30));
			}
			DrawLine("Slope",StudyBar,Open[StudyBar],0,Open[0],Color.Gray,DashStyle.Dot,3);
			if (CurrentBar <1)return;
			if (Filled == null && LongRunner != null && Math.Abs(EntryPrice - Input[0]) > (6 * TickSize))
			{
				CancelOrder(LongRunner);
				OrderPending = null;
			}
			if (Filled == null && LongBank != null && Math.Abs(EntryPrice - Input[0]) > (6 * TickSize))
			{
				CancelOrder(LongBank);
				OrderPending = null;
			}
			if (Filled == null && ShortRunner != null && Math.Abs(EntryPrice - Input[0]) > (6 * TickSize))
			{
				CancelOrder(ShortRunner);
				OrderPending = null;
			}
			if (Filled == null && ShortBank != null && Math.Abs(EntryPrice - Input[0]) > (6 * TickSize))
			{
				CancelOrder(ShortBank);
				OrderPending = null;
			}
			period = 14;
			Fast = 6;
			Slow = 13;
			Smooth = 9;
			numStdDev = 2;
			Upper = Fibs().CurrentChannelUpper;
			Lower = Fibs().CurrentChannelLower;
			if (Slope(Open,StudyBar,0) > 0)

Seems no matter what I try, I still get "Object reference not set to an instance of object" whenever I have no ticks for 30 minutes.

[NinjaTrader_Austin]

Sleeping Troll, please try comparing the 30 minute subtraction to Time[0] instead of Time[1].

[Sleeping Troll]

thx Austin, got it figured out, just a matter of get comfy with NJ objects and methods.