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NT7 programming - reset value of a variable at each bar
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NT7 programming - reset value of a variable at each bar

  #1 (permalink)
Elite Member
Budapest, Hungary
 
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adamov's Avatar
 
Posts: 84 since Jun 2012
Thanks: 37 given, 49 received

NT7 programming - reset value of a variable at each bar

Hi

I have a continuous tick by tick calculation. I need the changes of its value on each bar. I need a dataseries of them to make calculations.

I tried to reset the value with FirstTickOfBar. But sometimes it seems to ignore this part and adds the change to the value of the previous bar.
Could you tell me what is the problem or suggest any other solution to get the changes in value?

 
Code
		protected override void OnBarUpdate()
		{
			totalvol = totalvol + eVol;
			totalvolplot.Set(totalvol);	
			if(FirstTickOfBar)
			{
				totalvol = eVol;
			}
				
		}
				
		
		protected override void OnMarketData(MarketDataEventArgs e)
		{
			
			//Set AskPrice
			if(e.MarketDataType == MarketDataType.Ask)
			{
				AskPrice = e.Price;
			}
			
			//Set BidPrice
			if(e.MarketDataType == MarketDataType.Bid)
			{
				BidPrice = e.Price;
			}
			
			//Trade calculations done on incoming trade data
			if (e.MarketDataType == MarketDataType.Last)
			{
						
			//Buys calculations
				if(e.Price >= AskPrice)
				{
					eVol = e.Volume;
				}
		
				//Sells calculations
				if(e.Price <= BidPrice)
				{
					eVol = e.Volume;
				}
			}
		}

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  #2 (permalink)
Market Wizard
Birmingham UK
 
Futures Experience: Intermediate
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ratfink's Avatar
 
Posts: 3,441 since Dec 2012
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Answer
This post has been selected as an answer to the original posters question Answer

 
Code
protected override void OnBarUpdate()
		{
			if(FirstTickOfBar)
	 		{
				totalvol = eVol;
			}
			else
			{
				totalvol = totalvol + eVol;
			}
				
			totalvolplot.Set(totalvol);	
		}
I would usually keep all summation calcs inside the OMD routine and only do a zero reset inside OnBarUpdate but try that instead.

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