[Tams]

Originally Posted by Tradewinds »

...
So this is a beginning. Now I need to be able to stop one trend line when the next one starts.

...

note: // <-- add this line

var: Peak1(False);

Peak1 = C[1]>O[1] AND Close<O;

Variable: ID(-1);

If Peak1 Then 
Begin

    TL_SetExtRight( ID[1] , FALSE);  // <-- add this line

    ID = TL_New(Date[1], Time[1], H[1], Date, Time, H[1]);
    Value1 = TL_SetExtRight(ID, True);
End;

[Tradewinds]

This code will delete all the old trend lines. So there is only one trend line at a time. As soon as the new trend line is created, the old trend line is deleted. Note the addition of "OldKeyID"

Variable: OldKeyID(-1), ID(-1);

So the OldKeyID AND the ID are both being initialized at a value of -1. I'm guessing what happens, is that each new trend line is assigned a successive number. This still doesn't do what I want, I want all the old trend lines to remain on the chart. Maybe I can use the OldKeyID to end the last line instead of delete it.

var: Peak1(False);

Peak1 = C[1]>O[1] AND Close<O;

Variable: OldKeyID(-1), ID(-1);

If Peak1 Then Begin
  OldKeyID = ID;
  ID = TL_New(Date[1], Time[1], H[1], Date, Time, H[1]);
  Value1 = TL_SetExtRight(ID, True);
  
  If OldKeyID <> -1 Then
  Value1 = TL_Delete(OldKeyID);
 End;

[Tradewinds]

I made a change, and it didn't give me what I want, but it does give me some more information. Instead of deleting the OldKeyID trend line, I set the Right Extension to "False". What that did, is it left the old trend line in place, but the old trend line is now only 1 bar in length. So the old trend line is still there, but it's not extended to the start of the new trend line. So it looks like I may need to use the "OldKeyID", but instead of deleting it or setting the right extension to False, I need to somehow define where the new end is going to be.

var: Peak1(False);
Variable: OldKeyID(-1), ID(-1);

Peak1 = C[1]>O[1] AND Close<O;

If Peak1 Then Begin
  OldKeyID = ID;
  ID = TL_New(Date[1], Time[1], H[1], Date, Time, H[1]);
  Value1 = TL_SetExtRight(ID, True);
  
  If OldKeyID <> -1 Then
  Value1 = TL_SetExtRight(OldKeyID, False);
 End;

[Tradewinds]

Aah Hah, Hah, Hah Haaaaah!
I think I've done it!!!
I will now take over the world !!!


The code retrieves the new Start Time from the new trendline, and uses that as the End time for the old trend line. Then the code retrieves the Begin Value from the Old trend line and uses it as the end value for the old trend line. So the old trendline begins and ends at the same price - Horizontal line. But before the End is set for the old trendline, the extension to the right is shut down for the old trend line, but ONLY the Old trend line. So only the current trend line is being extended to the right. This causes the current trend line to be extended in "real time" as the chart is updating. As soon as a new Peak signal fires, the Extension to the Right shuts down and the ending point is defined for the last trendline.

var: Peak1(False);
Variable: OldKeyID(-1), ID(-1);
var: NewStartTime(t),OldStartPrice(h);

Peak1 = C[1]>O[1] AND Close<O;

If Peak1 Then Begin
  OldKeyID = ID;
  ID = TL_New(Date[1], Time[1], H[1], Date, Time, H[1]);
  Value1 = TL_SetExtRight(ID, True);
  
  If OldKeyID <> -1 Then
  Begin
    NewStartTime = TL_GetBeginTime(ID);
    OldStartPrice = TL_GetBeginVal(OldKeyID);
    Value1 = TL_SetExtRight(OldKeyID, False);
    Value2 = TL_SetEnd(OldKeyID, Date, NewStartTime, OldStartPrice);
  End;
 End;

[Tradewinds]

I've posted my completed EasyLanguage Auto Support and Resistance line indicator in the INDICATOR section:

http://www.traderslaboratory.com/for...uto-plots.html