How to make Indicator Values accessible by another indicator

[woodyfox]

Hi, I have an indicator that plots each bars sum of bid and ask values. I want to make this indicators bar values store in history. This way I can access the bar history with other indicators. Is this possible? The indicator is attached. Anybody's help would be appreciated. Thanks,

[NinjaTrader_AlanP]

Hello woodyfox,

You would not be able to access historical bid/ask values within OnMarketData. See the 2nd note at the following link for more information.

http://ninjatrader.com/support/helpGuides/nt8/en-us/?onmarketdata.htm

You may use TickReplay to accomplish this, or you may consider using a secondary series of tick data, and calculate buys as those that traded above the previous trade and sells as those that traded below the last trade. This would give you a historical plot.

Please let us know if you need further assistance.

[Arkadiy_B]

Hey.
You can sample a ready-made strategy file to understand how it works. If you can examples of two options.
Thank you.

[Arkadiy_B]

Here's what I got:
I pointed out in the strategy

else if(state == state.dataloaded)
		{
    			gomdeltavol = gomdeltavolume(multipler, true);
			addchartindicator(gomdeltavol);

                }

in the indicator

protected override void OnMarketData(MarketDataEventArgs e)
        {
			if(backtest)
			{
				if (e.MarketDataType == MarketDataType.Last)
					  {
					    if (e.Price >= e.Ask)
					    {
							Ask[0] += e.Volume;
					        Print(e.Volume + " contracts traded at asking price " + e.Ask);
					    }
					 
					    else if (e.Price <= e.Bid)
					    {
							Bid[0] += e.Volume;
					        Print(e.Volume + " Contracts Traded at bidding price " + e.Bid);
					    }
					  }
			}

when executing it produces an error

Indicator 'GomDeltaVolume': Error on calling 'OnMarketData' method on bar -1: You are accessing an index with a value that is invalid since it is out-of-range. I.E. accessing a series [barsAgo] with a value of 5 when there are only 4 bars on the chart.

How will I correctly access the DataSeries [] and store the value of the volume in it?

[NinjaTrader_AlanP]

Hello woodyfox,

Does your strategy have a current bar check? See the following for more information,

http://ninjatrader.com/support/forum/showthread.php?t=3170

What data series are you trying to access?

Here is a link that demonstrates how to access indicator values that are not plots,

http://ninjatrader.com/support/forum/showthread.php?t=4991

I look forward to your reply.