Keltner Channel with Multi and EMAs

[ij001]

Hi there

I am trying to modify the KeltnerChannel indicator to be able to use with Multi timeframes. Basically I want to plot the KC from a 10 min chart on a 3 min chart.

The code from the KeltnerChannel is straightforward.

But how do I use the EMA with the BarsArray[1] when there is already two parameters needed as below?

i.e.

double offset = EMA(diff, Period)[0] * offsetMultiplier;


with BarArray[1]??


EMA(IDataSeries input, int period)[int barsAgo]

I don't see in any examples how to deal with such a case and am stumped.

My code:

if (BarsInProgress == 0)
{


//diff.Set(High[0] - Low[0]);
diff.Set(Highs[1][0] - Lows[1][0]); // changed from above

//double middle = EMA(Typical, Period)[0];
double middle = EMA(BarsArray[1],Period)[0];


double offset = EMA(diff, Period)[0] * offsetMultiplier;
//double offset = EMA(diff, Period)[0] * offsetMultiplier;

double upper = middle + offset;
double lower = middle - offset;

Midline.Set(middle);
Upper.Set(upper);
Lower.Set(lower);


}

[NinjaTrader_Lance]

Hello,

Perhaps there is more to your goal than I am aware but you can have the 10 minute KC plot on a 3 minute chart without custom coding.

See attached image and notice the sections boxed in red.

Additionally if you didn't want the 10 min bars to be visibly showing you could right click the Y axis of the 3 min and click maximize

For more information on input series see "How to edit an indicator's parameters": http://www.ninjatrader.com/support/h...indicators.htm

Let me know if I can be of further assistance.

[ij001]

Hello,

Perhaps there is more to your goal than I am aware but you can have the 10 minute KC plot on a 3 minute chart without custom coding.

See attached image and notice the sections boxed in red.

Additionally if you didn't want the 10 min bars to be visibly showing you could right click the Y axis of the 3 min and click maximize

For more information on input series see "How to edit an indicator's parameters": http://www.ninjatrader.com/support/h...indicators.htm

Let me know if I can be of further assistance.

Hi Lance

That works great except I have other plots so when I click maximize those are minimized as well. Is there a work around for that?

Also can you clarify how to use the EMA with the multi?

EMA(IDataSeries input, int period)[int barsAgo]

so middle = EMA(BarsArray[1],Period)[0]; is fine

but

offset = EMA(diff, Period)[0] * offsetMultiplier;

and we need the "diff" for the calculation.

I diff to Highs[1][0] - Lows[1][0])....

[NinjaTrader_Lance]

Hi Lance

That works great except I have other plots so when I click maximize those are minimized as well. Is there a work around for that?

Attached is an example of how you could arrange it. Unfortunately you can't completely hide the 10 minute but it's also not cluttering up any space. I drug the 10 min to the bottom of the chart and then shrunk it's panel size so that it's not taking up space.

(you can drag series by left clicking them such that the black anchor points appear, once those show you can drag and drop the panel)

You will also be able to do this with the EMA. You can set the EMA to use the 10min bars (or whatever series you'd like) and plot it on the 3min panel

If you're set on making a custom indicator which takes a different time frame as input I would suggest reading through the following as it covers the usage of BarsInProgress: http://www.ninjatrader.com/support/h...nstruments.htm

Please let me know if I can be of further assistance.

[ij001]

Attached is an example of how you could arrange it. Unfortunately you can't completely hide the 10 minute but it's also not cluttering up any space. I drug the 10 min to the bottom of the chart and then shrunk it's panel size so that it's not taking up space.

(you can drag series by left clicking them such that the black anchor points appear, once those show you can drag and drop the panel)

You will also be able to do this with the EMA. You can set the EMA to use the 10min bars (or whatever series you'd like) and plot it on the 3min panel

If you're set on making a custom indicator which takes a different time frame as input I would suggest reading through the following as it covers the usage of BarsInProgress: http://www.ninjatrader.com/support/h...nstruments.htm

Please let me know if I can be of further assistance.

Hi Lance

Thanks.

Now I have gone through the BIP documentation to see if there was something I was missing. Unfortantely, I can't find any examples on how to work with this.

Would I have to overload the EMA or something to get it to work with the multi or is it okay as is?

offset = EMA(diff, Period)[0] * offsetMultiplier;

As I said I'm confused because of the need for the BarsArray[1]. I still think working inside BIP == 0 the primary timeframe is the best choice.

Keltner Code with multi.

if (BarsInProgress == 0)
{


//diff.Set(High[0] - Low[0]);
diff.Set(Highs[1][0] - Lows[1][0]); // changed from above

//double middle = EMA(Typical, Period)[0];
double middle = EMA(BarsArray[1],Period)[0];


double offset = EMA(diff, Period)[0] * offsetMultiplier;
//double offset = EMA(diff, Period)[0] * offsetMultiplier;

double upper = middle + offset;
double lower = middle - offset;

Midline.Set(middle);
Upper.Set(upper);
Lower.Set(lower);


}

[NinjaTrader_Lance]

Hello,

I went ahead and created a custom EMA indicator that uses the default time frame and a 10minute time frame.

It draws 2 EMAs. One based on the primary and one based on the 10 minute.

Note, due to the sloppy programming logic I used it will only work when COBC is true but should help you better understand how this can be done.

I've re-read your post a couple times now and I'm not entirely sure I understand what you're trying to accomplish. Perhaps I can better explain with some more information.

Please let me know if I can be of further assistance.

[koganam]

Hi Lance

Thanks.

Now I have gone through the BIP documentation to see if there was something I was missing. Unfortantely, I can't find any examples on how to work with this.

Would I have to overload the EMA or something to get it to work with the multi or is it okay as is?

offset = EMA(diff, Period)[0] * offsetMultiplier;

As I said I'm confused because of the need for the BarsArray[1]. I still think working inside BIP == 0 the primary timeframe is the best choice.

Keltner Code with multi.

if (BarsInProgress == 0)
{


//diff.Set(High[0] - Low[0]);
diff.Set(Highs[1][0] - Lows[1][0]); // changed from above

//double middle = EMA(Typical, Period)[0];
double middle = EMA(BarsArray[1],Period)[0];


double offset = EMA(diff, Period)[0] * offsetMultiplier;
//double offset = EMA(diff, Period)[0] * offsetMultiplier;

double upper = middle + offset;
double lower = middle - offset;

Midline.Set(middle);
Upper.Set(upper);
Lower.Set(lower);


}

What is the error in your log? It seems you must be hitting some initial or boundary condition that is causing an exception.

[ij001]

Hello,

I went ahead and created a custom EMA indicator that uses the default time frame and a 10minute time frame.

It draws 2 EMAs. One based on the primary and one based on the 10 minute.

Note, due to the sloppy programming logic I used it will only work when COBC is true but should help you better understand how this can be done.

I've re-read your post a couple times now and I'm not entirely sure I understand what you're trying to accomplish. Perhaps I can better explain with some more information.

Please let me know if I can be of further assistance.

Hi Lance

Thanks for your sample.

What I got from it is that you can use BIP == 0 and BIP == 1 together.

What I'm trying to do is use the pre-existing Keltner Channel indicator and plot 10 min Keltner channels on a smaller time frame.

In this indicator there is an upper, middle, lower EMA. The middle EMA was the plotting of the 10 min EMA.

I'm still a little confused to how we use the Values[0], Values[1], etc. That is probably why my updated code below is still a bit off compared to a regular 10 min chart plotting the Keltner channels when compared.

[NinjaTrader_Lance]

Hello,

I'm still a little confused to how we use the Values[0], Values[1], etc. That is probably why my updated code below is still a bit off compared to a regular 10 min chart plotting the Keltner channels when compared.

Values[x] will refer to the
Midline is what you will get when you call Values[0]
Upper
Lower

I've attached an updated version which should help illustrate how you can use a secondary data series to plot the values.

For a forum example: http://www.ninjatrader.com/support/f...ead.php?t=3572

Please let me know if I can be of further assistance.

[ij001]

Hi Lance

Thanks for all your help. Both examples were really helpful.

Last question in general why do we need to use

EMA(Typical, period)[0] ?

Can't we just call EMA(period)[0]?

Don't we need just the closing price of the EMA?

Irvin

[NinjaTrader_Lance]

Hello,

Last question in general why do we need to use

EMA(Typical, period)[0] ?

Can't we just call EMA(period)[0]?

Don't we need just the closing price of the EMA?

You could do this however it would not be the same result. EMA can take either a period or period and an input series for its inputs.

The KC uses Typical in its calculations as this is (High + Low + Close) / 3 instead of the Close price which would be used in your example.

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?typical.htm