Trailing Indicator

[JT1230]

I wanted to create an indicator showing the 3 day highest high and lowest low, which is similar to Donchain Channel. Something like what I've attached. I was wondering how should I programme it.

[NinjaTrader_ShawnB]

Hello,
Hello,
Use DrawHorizontalLine() to draw lines representing your 3 day high and 3 day low values. I have included an example below of how to accomplish this.

[COLOR=#000000][FONT=Tahoma]protected override void Initialize()
        {      Add(PeriodType.Day, 1);
        }[/FONT][/COLOR]
[COLOR=#000000][FONT=Tahoma][LEFT][FONT=Courier New][SIZE=2]  [/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#0000FF] protected[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2] [/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#0000FF]override[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2] [/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#0000FF]void[/COLOR][/SIZE][/FONT] [FONT=Courier New][SIZE=2]OnBarUpdate()[/SIZE][/FONT]
[FONT=Courier New][SIZE=2]        {[/SIZE][/FONT]
[FONT=Courier New][SIZE=2]                  [/SIZE][/FONT]
[FONT=Courier New][SIZE=2]                stopPricehigh = High[[/SIZE][/FONT] [FONT=Courier New][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]];    [/SIZE][/FONT]
[FONT=Courier New][SIZE=2]
[/SIZE][/FONT]
[FONT=Courier New][SIZE=2]                  [/SIZE][/FONT] [FONT=Courier New][SIZE=2][COLOR=#0000FF]if[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2](High[[/SIZE][/FONT] [FONT=Courier New][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]] <= HighestBar(Highs[[/SIZE][/FONT] [FONT=Courier New][SIZE=2][COLOR=#800080]1[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]], [/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800080]3[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]))[/SIZE][/FONT]
[FONT=Courier New][SIZE=2]            {[/SIZE][/FONT]
[FONT=Courier New][SIZE=2]             ExitLongStop(stopPricehigh);[/SIZE][/FONT]
[FONT=Courier New][SIZE=2]            }     [/SIZE][/FONT]
[FONT=Courier New][SIZE=2]                  [/SIZE][/FONT]
[FONT=Courier New][SIZE=2]                  [/SIZE][/FONT]
[FONT=Courier New][SIZE=2]                  [/SIZE][/FONT]
[FONT=Courier New][SIZE=2]                  [/SIZE][/FONT]
[FONT=Courier New][SIZE=2]                  [/SIZE][/FONT]
[FONT=Courier New][SIZE=2]                stopPrice = Low[[/SIZE][/FONT] [FONT=Courier New][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]];    [/SIZE][/FONT]
[FONT=Courier New][SIZE=2]
[/SIZE][/FONT]
[FONT=Courier New][SIZE=2]                  [/SIZE][/FONT] [FONT=Courier New][SIZE=2][COLOR=#0000FF]if[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2](Low[[/SIZE][/FONT] [FONT=Courier New][SIZE=2][COLOR=#800080]0[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]] <= LowestBar(Lows[[/SIZE][/FONT] [FONT=Courier New][SIZE=2][COLOR=#800080]1[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]], [/SIZE][/FONT][FONT=Courier New][SIZE=2][COLOR=#800080]3[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2]))[/SIZE][/FONT]
[FONT=Courier New][SIZE=2]            {[/SIZE][/FONT]
[FONT=Courier New][SIZE=2]             ExitLongStop(stopPrice);[/SIZE][/FONT]
[FONT=Courier New][SIZE=2]            }     [/SIZE][/FONT]
[FONT=Courier New][SIZE=2]                  [/SIZE][/FONT]
[FONT=Courier New][SIZE=2]                  [/SIZE][/FONT]
[FONT=Courier New][SIZE=2]                  DrawHorizontalLine([/SIZE][/FONT] [FONT=Courier New][SIZE=2][COLOR=#800000]"HighLine"[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2] , stopPricehigh, Color.Black);[/SIZE][/FONT]
[FONT=Courier New][SIZE=2]                  [/SIZE][/FONT]
[FONT=Courier New][SIZE=2]                  DrawHorizontalLine([/SIZE][/FONT] [FONT=Courier New][SIZE=2][COLOR=#800000]"LowLine"[/COLOR][/SIZE][/FONT][FONT=Courier New][SIZE=2] , stopPrice, Color.Black);[/SIZE][/FONT][/LEFT]
[/FONT][/COLOR]

[Harry]

What you have attached is a Donchian Channel displaced by one bar.

Simply take the standard Donchian Channel and set the Displacement to +1.

Attached is a screenshot showing a displaced Donchian Channel for the section of the ES chart that you have posted.

It is my own version of the Donchian Channel, which has a trend filter added.

[JT1230]

May I know what does the () and [] mean in DonchianChannel? For example: DonchianChannel(1).Lower[10]

And can someone tell me whats the difference between period n bar? Thx

[Harry]

May I know what does the () and [] mean in DonchianChannel? For example: DonchianChannel(1).Lower[10]

And can someone tell me whats the difference between period n bar? Thx

(1) is the lookback period. To implement your idea you would need to set the lookback period to 3.

[10] indicates the bar which is used to perform calculations. A value of 10 indicates that the last bar used for calculations was 10 bars ago. 0 designs the current bar.

For example DonchianChannel(1).Lower[10] means the lower channel of a 1-period Donchian Channel (this would be just the low) calculated 10 bars ago. Therefore it will return the low of the bar 10 bars ago.

[NinjaTrader_ShawnB]

Hello JT1230,
Harry is correct. The () holds a value for the period or number of bars used in the calculation. The [] holds a int value specifying the number of bars ago.
I have included the Donchian Channel Help Guide to assist you further.

[JT1230]

Sorry I'm a newbie, please bear with me. I didn't get what you meant. Are you saying that both Periods and Bars ago are for calculation? It would be easier for me to comprehend if you can attach a picture for me to compare.