Donchian Channel Indicator

AFL Programming
#1

Hi,

Greetings. Looking for Donchian Channel indicator to be added to my chart.
Can anyone help?

Thanks.

Trying to Optimize a Donchian Channel. Whats wrong with code?
#2

@xperia28 There are examples all over the internet. Just do a simple Google search.

Here is an example,

// Plots a 20 period Donchian channel

periods = Param("periods", 20, 5, 100, 1);
DonchianUpper =HHV(Ref(H,-1),periods);
DonchianLower = LLV(Ref(L,-1),periods);
DonchianMiddle = (DonchianUpper+DonchianLower)/2;


Plot(C,"C",colorBlack,styleBar| styleThick); 

Plot(DonchianUpper,"DU",colorBlue,styleLine);
Plot(DonchianMiddle,"DM",colorGreen,styleLine);
Plot(DonchianLower,"DL",colorRed,styleLine);

Or if you want add a second channel and trading rules as in this one,

// Channel Trading system

////////////////////////////
// Constants
////////////////////////////

Float = 100000;
MaxPositions = 1;

////////////////////////
// Backtester Options
///////////////////////

SetOption( "MaxOpenPositions", MaxPositions );
SetOption( "InitialEquity", Float );
SetPositionSize( 100 / MaxPositions, spsPercentOfEquity );
Buy = Sell = Short = Cover = 0;


////////////////////
// Parameters
////////////////////

LTPeriods = Param("LongTermPeriods",60,40,100,1); // Long Term lookback period
STPeriods = Param("ShortTermPeriods",20,10,40,1); // Short Term lookback period

//////////////////////
// Arrays
//////////////////////

UpperLTChannel = HHV( Ref( H, -1 ), LTPeriods ); // Highest high value of highs in last LongTermPeriods
LowerLTChannel = LLV( Ref( L, -1 ), LTPeriods ); // Lowest low value of low in last LongTermPeriods

UpperSTChannel = HHV( Ref( H, -1 ), STPeriods ); // Highest high value of highs in last ShortTermPeriods
LowerSTChannel = LLV( Ref( L, -1 ), STPeriods ); // Lowest low value of low in last ShortTermPeriods



////////////////////////
// Entries and Exits
////////////////////////

Buy = H>Ref(UpperLTChannel,-1);
Short = L<Ref(LowerLTChannel,-1);
Cover = H>Ref(UpperSTChannel,-1);
Sell = L<Ref(LowerSTChannel,-1);

Buy=ExRem(Buy,Sell);
Sell=ExRem(Sell,Buy);

Short = ExRem(Short,Cover);
Cover = ExRem(Cover,Short);

////////////////////////
// Exploration
////////////////////////

Filter = 1;
AddColumn( C, "Close" );

AddColumn( UpperLTChannel, "Upper LT Channel", 1.2, colorBlack, colorLime );
AddColumn( UpperSTChannel, "Upper ST Channel", 1.2, colorGreen, colorLightYellow );
AddColumn( LowerLTChannel, "Lower LT Channel", 1.2, colorBlack, colorRose );
AddColumn( LowerSTChannel, "Lower ST Channel", 1.2, colorBlack, colorDefault );


////////////////////////
// Charting
////////////////////////
 
 
Plot(UpperLTChannel,"UpperLTChannel",colorBlue,styleThick);
Plot(LowerLTChannel,"LowerLTChannel",colorRed,styleThick);
Plot(UpperSTChannel,"UpperSTChannel",colorBlue,styleDashed);
Plot(LowerSTChannel,"LowerLTChannel",colorRed,styleDashed);
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