Data leakage between charts?

[seahn]

I have a simple indicator for displaying the ask/bid/volume (my eyes are too bad to see the ChartTrader ask/bid) and counting down ticks remaining in bar as well as a couple of other calculated values in large text on the chart. In my setup I have 2 charts open ES and EURUSD.

The problem I am having is that occasionally (once ever 10-30 seconds) ES data will appear on the EURUSD chart and vise versa. It is not critical in this use but I am concerned this may happen in other instances where it matters.

Below is the OnBarUpdate method I am using:

        protected override void OnBarUpdate()
        {
            //Add your custom indicator logic here.
            volume = Volume[0];
            double count=0, avgATR;
            string strCount="";
            
            if (CurrentBar<30) return;
            if (State == State.Historical) return;
                
            volume = Volume[0];
            avgATR=EMA(ATR(atrPeriod),4)[1];
            
            if (IsFirstTickOfBar)
            {    playedAlert = false;
                trend=0;
                for (int i=1; i<=12; i++)
                    trend = trend + ZLEMA(21)[i]-EMA(20)[i];
                trend = trend/avgATR;
            }
            
            // tick counter2
            if (BarsPeriod.BarsPeriodType == BarsPeriodType.Tick)
            {      // calculate the tick count value
                count = BarsPeriod.Value - Bars.TickCount;
                strCount=count.ToString()+" "+"Ticks";
            }
            else if (BarsPeriod.BarsPeriodType == BarsPeriodType.Volume)
            {    // calculate the volume count value
                count = BarsPeriod.Value - volume;
                strCount=count.ToString()+" "+"Volume";
            }

            a=GetCurrentAsk();                    
            av=(int)GetCurrentAskVolume();
            b=GetCurrentBid();
            bv=(int)GetCurrentBidVolume();        

            if (DisplayText)
            {    string v = "Ask/Bid:\n"+
                            a.ToString("F"+DecimalPlaces.ToString())+"-"+av.ToString().PadLeft(5,' ')+"\n"+
                            b.ToString("F"+DecimalPlaces.ToString())+"-"+bv.ToString().PadLeft(5,' ')+"\n\n"+
                            strCount+"\n";
                NinjaTrader.Gui.Tools.SimpleFont myFont = new NinjaTrader.Gui.Tools.SimpleFont("Arial Bold", FontSize) { Size = FontSize, Bold = true };
                Draw.TextFixed(this,"BidAsk",v,TextPosition.TopRight,Brushes.White,myFont,Brushes.Transparent,Brushes.White,0);
                if (Instrument.FullName=="EURUSD") Print("EURUSD Ask: "+a.ToString()+"   Ask Vol: "+av.ToString());
            }            
            
            if (DisplayAskLine) Draw.Ray(this,"AL", 30, a, 0, a, Brushes.Green);
            if (DisplayBidLine) Draw.Ray(this,"BL", 30, b, 0, b, Brushes.Red);            

            atr=avgATR;
            if (ATRMultiplier!=0) atr=ATRMultiplier * atr;
            NinjaTrader.Gui.Tools.SimpleFont myFont2 = new NinjaTrader.Gui.Tools.SimpleFont("Arial Bold", FontSize) { Size = FontSize, Bold = true };
            Draw.TextFixed(this, "ATR","ATR: "+atr.ToString("F2")
                                    + "\n"+"Trd: "+trend.ToString("F2")
                                    +"\n\n",TextPosition.BottomRight,Brushes.White,myFont2,Brushes.Transparent,Brushes.White,0);
            
            if (PlayAlertOnTicksLeft!=-1 && !playedAlert && count<PlayAlertOnTicksLeft)
            {    PlaySound(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments)+EndofBarAudio);
                playedAlert=true;
            }
        }

Below is the output window text showing the problem note the 2271 ES data on this EURUSD chart.

EURUSD Ask: 1.06576 Ask Vol: 8
EURUSD Ask: 1.06577 Ask Vol: 3
EURUSD Ask: 1.06575 Ask Vol: 4
EURUSD Ask: 1.06576 Ask Vol: 1
EURUSD Ask: 2271 Ask Vol: 1129
EURUSD Ask: 1.0658 Ask Vol: 9
EURUSD Ask: 1.0658 Ask Vol: 1
EURUSD Ask: 1.06575 Ask Vol: 9
EURUSD Ask: 1.06576 Ask Vol: 8
EURUSD Ask: 1.06576 Ask Vol: 2
EURUSD Ask: 2270.75 Ask Vol: 319
EURUSD Ask: 1.06577 Ask Vol: 1
EURUSD Ask: 1.06576 Ask Vol: 1
EURUSD Ask: 1.06576 Ask Vol: 2
EURUSD Ask: 1.06577 Ask Vol: 1

I have tried to use the Dispatcher and Lock thread to make sure there are no threading issues but that does not help. Any idea what I am doing wrong?

[NinjaTrader_JessicaP]

Hello seahn, and thank you for your question. I noticed most of your variables are not prototyped inside your function scope. That is, your code is

[FONT=Courier New]
            a=GetCurrentAsk();   
            av=(int)GetCurrentAskVolume();
            b=GetCurrentBid();
            bv=(int)GetCurrentBidVolume();[/FONT]

and not

[FONT=Courier New]
            [B]double [/B]a=GetCurrentAsk();   
            [B]double [/B]av=(int)GetCurrentAskVolume();
            [B]double [/B]b=GetCurrentBid();
            [B]double [/B]bv=(int)GetCurrentBidVolume();[/FONT]

You will want to review the code where a, av, b, and bv are prototyped. If the keyword "static" appears near here, you will then need to remove this keyword, otherwise your charts will share memory.

If you have reviewed this code and are confident it is local to the instance variable, please send a stripped down code sample to platformsupport[at]ninjatrader[dot]com, referencing attn:ninjatrader_jessicap and 11627624 in the subject line, and we will be happy to assist further.