OnBarUpdate & OnMarketDepth

[dsraider]

My code has OnBarUpdate followed by OnMarketDepth. I print from OnBarUpdate. Is there a way to grab a parameter from OnMarketDepth, like e.Price, and print from OnBarUpdate?

Thanks.

[RJay]

My code has OnBarUpdate followed by OnMarketDepth. I print from OnBarUpdate. Is there a way to grab a parameter from OnMarketDepth, like e.Price, and print from OnBarUpdate?

Thanks.

dsraider,

You can Print from OnMarketDepth.

RJay

[dsraider]

rt6176,

Thanks but my If ---> Print statement is in OnBarUpdate. I have no problem moving Print down to Depth but I'm not sure if that's possible, as I don't know how to make one communicate with the other. Maybe a bool in OnBar following by an If (bool = true) Print in Depth?

[RJay]

rt6176,

Thanks but my If ---> Print statement is in OnBarUpdate. I have no problem moving Print down to Depth but I'm not sure if that's possible, as I don't know how to make one communicate with the other. Maybe a bool in OnBar following by an If (bool = true) Print in Depth?

Hi dsraider,

If you define the variable you want to print in the Initialize area, you can call it from any method.

You can assign a value to the variable in OnMarketDepth and you can print it from OnBarUpdate.

RJay

[dsraider]

Hey RJay,

That sounds perfect but I can't seem to compile:

protected override void Initialize()
{
     double lastPrice = 0;
}

protected override void OnBarUpdate()
{
     Print(lastPrice);
}

protected override void OnMarketDepth(MarketDepthEventArgs e)
{
     double lastPrice = e.Price;
} 

I'm sure I did something stupid. Do you see it?

[koganam]

Hey RJay,

That sounds perfect but I can't seem to compile:

protected override void Initialize()
{
     double lastPrice = 0;
}

protected override void OnBarUpdate()
{
     Print(lastPrice);
}

protected override void OnMarketDepth(MarketDepthEventArgs e)
{
     double lastPrice = e.Price;
} 

I'm sure I did something stupid. Do you see it?

Your lastPrice variables are completely different and independent variables because of the way that you have defined them. They are each local to the scope where they are defined and so totally unrelated, despite the identity of name.

Instead define the lastPrice in the "Variables" section, so that it is a class variable. Then access the variable from any event, by direct query.

[dsraider]

Hey koganam,

I hear you loud and clear and that is what I normally do. The problem here, though, is that I'm trying to print OnMarketDepth data from OnBarUpdate because I need the OnBarUpdate logic to decide whether or not to print.

Defining lastPrice in Variables and then printing in OnBarUpdate just throws me a "0."

Maybe there's another way to print MarketDepth data from OnBar?

[koganam]

Hey koganam,

I hear you loud and clear and that is what I normally do. The problem here, though, is that I'm trying to print OnMarketDepth data from OnBarUpdate because I need the OnBarUpdate logic to decide whether or not to print.

Defining lastPrice in Variables and then printing in OnBarUpdate just throws me a "0."

Maybe there's another way to print MarketDepth data from OnBar?

1. You declare/define lastPrice as a class variable.
2. You assign lastPrice in OnMarketDepth().
3. You print/output lastPrice in OnBarUpdate().

You must assign a variable a value before you can see what value you assigned it.

[dsraider]

I believe I understand you correctly but I'm still getting 0s with this:

#region Variables
double lastPrice = 0;
#endregion

protected override void OnBarUpdate()
{
     Print(lastPrice);
}

protected override void OnMarketData(MarketDepthEventArgs e)
{
     double lastPrice = e.Price;
} 

[RJay]

I believe I understand you correctly but I'm still getting 0s with this:

#region Variables
double lastPrice = 0;
#endregion

protected override void OnBarUpdate()
{
     Print(lastPrice);
}

protected override void OnMarketData(MarketDepthEventArgs e)
{
     double lastPrice = e.Price;
} 

You need live market data or replay data running for this to work.

[dsraider]

I've been trying this on reply all day and have very little hair left on my head

[NinjaTrader_Ray]

I've been trying this on reply all day and have very little hair left on my head

in OnMarketData, remove "double" so it just looks like this

lastPrice = e.Price;

[dsraider]

That did it.

Thanks, Ray!

[koganam]

I believe I understand you correctly but I'm still getting 0s with this:

#region Variables
double lastPrice = 0;
#endregion

protected override void OnBarUpdate()
{
     Print(lastPrice);
}

protected override void OnMarketData(MarketDepthEventArgs e)
{
     double lastPrice = e.Price;
} 

I believe that I strongly advised you to access the value, without redeclaring it for local scope? OK, I know I did not put it in quite those words.

[dsraider]

Hahaha you have way too much faith in my ability to comprehend coherent English but I did click the "Thanks" button for getting me into "Variables."

I'm not a programmer so plenty of this talk goes right over my head