[Tams]

This thread is about using EasyLanguage to draw trendlines on a chart.





TL_New

Displays a trendline, with the specified starting and ending points,
on the chart that the study is based on;

returns a trendline-specific ID number, required to modify the trendline.

Usage

TL_New (sDate, sTime, sPriceValue, eDate, eTime, ePriceValue)

Parameters

sDate - a numerical expression specifying the trendline starting point date;
the date is indicated in the YYYMMdd format,
where YYY is the number of years since 1900,
MM is the month,
and dd is the day of the month

sTime - a numerical expression specifying the trendline starting point time;
the time is indicated in the 24-hour HHmm format,
where 1300 = 1:00 PM

sPriceValue - a numerical expression specifying the trendline starting point price value
(vertical position, corresponding to a value on the price scale of a chart)

eDate - a numerical expression specifying the trendline ending point date

eTime - a numerical expression specifying the trendline ending point time

ePriceValue - a numerical expression specifying the trendline ending point price value

Example

Display a trendline,
that begins at 9:00 AM at a price value of 1381,
and ends at 3:00 PM at a price value of 1337,
on January 17th, 2008,
on the chart that the study is based on:

Value1 = TL_New( 1080117, 900, 1381, 1080117, 1500, 1337);





source: EasyLanguage Manual

[Tams]

examples of trendline

How to Draw a Tape
http://www.traderslaboratory.com/for...tape-5646.html

[Tams]

Here's an example of
drawing a trendline
at the highest high and the lowest low of X days back.


it utilizes the highD and lowD functions to obtain the highest/lowest prices.





MC version can be used on sub-minute charts.
i.e. tick, seconds, volume bar, etc.

[aaa]

An other great Topic from Tams

[aaa]

I think that I understand TL_New but no way to extend extend lines on the right !!!

I've coded something horrible and complicate , but it works

Tams, If you have time to correct it I will appreciate it a lot

// HL bar (MC)
// version: beta 0.1
// author: TAMS
// date: 20090426
// license: public use
// description: this indicator draws a trendline 
// at the highest high and lowest low of X days back

input:
lookback(	1	),
Line.size (	1 	),
Line.style (	1	),
color.tl.h(	blue	),
color.tl.l(	red	);
// 1
if date <> date[1] and lookback = 1 then begin
	value1 = tl_new_s(d , time_s , highd(1), d  , time_s, highd(1 ));	
	value2 = tl_new_s(d  , time_s, lowd(1), d  , time_s, lowd(1));

	tl_setcolor( value1, color.tl.h );
	TL_SetSize(  value1, Line.size  );
	TL_SetStyle( value1, Line.style );		
	
	tl_setcolor(  value2 , color.tl.l );
	TL_SetSize(   value2, Line.size   );
	TL_SetStyle(  value2, Line.style  );		
end;

if lookback = 1 then begin
tl_setend_s(value1, d , time_s , highd(1) );
tl_setend_s(value2, d , time_s , lowd(1)  );
end;

// 2
if date <> date[1] and lookback = 2 then begin
	value1 = tl_new_s(d , time_s , highd(1), d  , time_s, highd(1 ));	
	value2 = tl_new_s(d  , time_s, lowd(1), d  , time_s, lowd(1));
	value3 = tl_new_s(d , time_s , highd(2), d  , time_s, highd(2 ));	
	value4 = tl_new_s(d  , time_s, lowd(2), d  , time_s, lowd(2));
	
	tl_setcolor( value1, color.tl.h );
	TL_SetSize(  value1, Line.size  );
	TL_SetStyle( value1, Line.style );		
	
	tl_setcolor(  value2 , color.tl.l );
	TL_SetSize(   value2, Line.size   );
	TL_SetStyle(  value2, Line.style  );
	
	tl_setcolor( value3, color.tl.h );
	TL_SetSize(  value3, Line.size  );
	TL_SetStyle( value3, Line.style );		
	
	tl_setcolor(  value4 , color.tl.l );
	TL_SetSize(   value4, Line.size   );
	TL_SetStyle(  value4, Line.style  );			
end;
if lookback = 2 then begin
tl_setend_s(value1, d , time_s , highd(1) );
tl_setend_s(value2, d , time_s , lowd(1)  );
tl_setend_s(value3, d , time_s , highd(2) );
tl_setend_s(value4, d , time_s , lowd(2)  );
end;

// 3
if date <> date[1] and lookback = 3 then begin
	value1 = tl_new_s(d , time_s , highd(1), d  , time_s, highd(1 ));	
	value2 = tl_new_s(d  , time_s, lowd(1), d  , time_s, lowd(1));
	value3 = tl_new_s(d , time_s , highd(2), d  , time_s, highd(2 ));	
	value4 = tl_new_s(d  , time_s, lowd(2), d  , time_s, lowd(2));
	value5 = tl_new_s(d , time_s , highd(3), d  , time_s, highd(3 ));	
	value6 = tl_new_s(d  , time_s, lowd(3), d  , time_s, lowd(3 ));
		
	tl_setcolor( value1, color.tl.h );
	TL_SetSize(  value1, Line.size  );
	TL_SetStyle( value1, Line.style );		
	
	tl_setcolor(  value2 , color.tl.l );
	TL_SetSize(   value2, Line.size   );
	TL_SetStyle(  value2, Line.style  );
	
	tl_setcolor( value3, color.tl.h );
	TL_SetSize(  value3, Line.size  );
	TL_SetStyle( value3, Line.style );		
	
	tl_setcolor(  value4 , color.tl.l );
	TL_SetSize(   value4, Line.size   );
	TL_SetStyle(  value4, Line.style  );
	
	tl_setcolor( value5, color.tl.h );
	TL_SetSize(  value5, Line.size  );
	TL_SetStyle( value5, Line.style );		
	
	tl_setcolor(  value6 , color.tl.l );
	TL_SetSize(   value6, Line.size   );
	TL_SetStyle(  value6, Line.style  );					
end;

if lookback = 3 then begin
tl_setend_s(value1, d , time_s , highd(1) );
tl_setend_s(value2, d , time_s , lowd(1)  );
tl_setend_s(value3, d , time_s , highd(2) );
tl_setend_s(value4, d , time_s , lowd(2)  );
tl_setend_s(value5, d , time_s , highd(3) );
tl_setend_s(value6, d , time_s , lowd(3)  );
end;

// 4
if date <> date[1] and lookback = 4 then begin
	value1 = tl_new_s(d , time_s , highd(1), d  , time_s, highd(1 ));	
	value2 = tl_new_s(d  , time_s, lowd(1), d  , time_s, lowd(1));
	value3 = tl_new_s(d , time_s , highd(2), d  , time_s, highd(2 ));	
	value4 = tl_new_s(d  , time_s, lowd(2), d  , time_s, lowd(2));
	value5 = tl_new_s(d , time_s , highd(3), d  , time_s, highd(3 ));	
	value6 = tl_new_s(d  , time_s, lowd(3), d  , time_s, lowd(3 ));
	value7 = tl_new_s(d , time_s , highd(4), d  , time_s, highd(4 ));	
	value8 = tl_new_s(d  , time_s, lowd(4), d  , time_s, lowd(4 ));
		
	tl_setcolor( value1, color.tl.h );
	TL_SetSize(  value1, Line.size  );
	TL_SetStyle( value1, Line.style );		
	
	tl_setcolor(  value2 , color.tl.l );
	TL_SetSize(   value2, Line.size   );
	TL_SetStyle(  value2, Line.style  );
	
	tl_setcolor( value3, color.tl.h );
	TL_SetSize(  value3, Line.size  );
	TL_SetStyle( value3, Line.style );		
	
	tl_setcolor(  value4 , color.tl.l );
	TL_SetSize(   value4, Line.size   );
	TL_SetStyle(  value4, Line.style  );
	
	tl_setcolor( value5, color.tl.h );
	TL_SetSize(  value5, Line.size  );
	TL_SetStyle( value5, Line.style );		
	
	tl_setcolor(  value6 , color.tl.l );
	TL_SetSize(   value6, Line.size   );
	TL_SetStyle(  value6, Line.style  );
	
	tl_setcolor( value7, color.tl.h );
	TL_SetSize(  value7, Line.size  );
	TL_SetStyle( value7, Line.style );		
	
	tl_setcolor(  value8 , color.tl.l );
	TL_SetSize(   value8, Line.size   );
	TL_SetStyle(  value8, Line.style  );						
end;

if lookback = 4 then begin
tl_setend_s(value1, d , time_s , highd(1) );
tl_setend_s(value2, d , time_s , lowd(1)  );
tl_setend_s(value3, d , time_s , highd(2) );
tl_setend_s(value4, d , time_s , lowd(2)  );
tl_setend_s(value5, d , time_s , highd(3) );
tl_setend_s(value6, d , time_s , lowd(3)  );
tl_setend_s(value7, d , time_s , highd(4) );
tl_setend_s(value8, d , time_s , lowd(4)  );
end;

[sneo]

you are missing "TL_SetExtRight(xxx,True) " for all your trend lines that you want to extend where xxx is the name of those trendline.

[Tams]

Originally Posted by aaa »

I think that I understand TL_New but no way to extend extend lines on the right !!!
I've coded something horrible and complicate , but it works
Tams, If you have time to correct it I will appreciate it a lot

I am not sure if I understand what you want to achieve.

Can you make a screen shot, then draw some lines/arrows/notes to illustrate your intention?

[aaa]

It's good to have friends all over the world

The idea is simple and works like classicals pivots

The goal is to have High Blue and low Red in a solid color

And to extend in Dotted lines to the right during xDays

The circles shows interesting S/R on the 15 mn graph

They are a lot of pullback in 1 mn on these support