1 Indicator line, two colors, same line , HOW ?

New comment
 
HI, Is it possible to draw a line in the indicator box, and have it change colors when a condition changes. Please show an example..thx..
 
icm63:
HI, Is it possible to draw a line in the indicator box, and have it change colors when a condition changes. Please show an example..thx..

I just made one cutom indicator that is "one" line with two colors. In fact, they are two lines (two drawing buffers). Example: you have to do two things. Create two plot buffers (property and Set.....) and set the line break where you want. I look at an example of the Awesome indicator in my navigation window and open it with meta edit. (in your too).


Set property buff1 to Red;
set proerty buff2 to Green;

if (a>1.0) buff1 = iMA(......);
else buff2 = iMA(....);


your plot will look single line with the color change around ima=1.0.
 
See the example in Code Base - Three Colors
 
As it understand(correct me if i am wrong) but using setindexbuffer doesnt work, you have to use icustom for this ptoblem.
 
kervin:
As it understand(correct me if i am wrong) but using setindexbuffer doesnt work, you have to use icustom for this ptoblem.

kervin, ummm, you are wrong. But don't worry - it's how we learn! I expect that I've made more coding errors than most on this forum (I've been coding *gulp* 40 years ... and still learning).

SetIndexBuffer works just fine for 2 (or 3) colour lines. You need 2 (or 3) of them to do it.

All iCustom does is 'get value from another indicator module' . Should that indicator itself have 2 or 3 colours for a line, then you'll need to call iCustom 2 or 3 times

 

If its confortable for you i suggest to not use lines for coloring, you will always have some issues with redrawing/not drawing. I have not yet found a way to code around this problem. (Lines must have always at least to following non empty values to be drawn)

If you want lines. i suggest to use 3 buffers: Buf1 for the main line, that is draw always, buf2 and buf3 for the coloring.

The better thing (form my point of view) is to use arrows (arrowcode 108 is a dot) to make the coloring, might be not look that good as a colored line, but at least it is drawn correctly.

 

add: see this example of a colored MA. You can switch between dot and line style drawing...

//+------------------------------------------------------------------+
//|                                               WMMM-ColoredMA.mq4 |
//|                                       when-money-makes-money.com |
//|                                       when-money-makes-money.com |
//+------------------------------------------------------------------+
#property copyright "when-money-makes-money.com"
#property link      "when-money-makes-money.com"

#property indicator_chart_window
#property indicator_buffers 3
#property indicator_color1 Yellow
#property indicator_color2 Blue
#property indicator_color3 Red
//---- buffers
double MA[];
double MA.up[];
double MA.do[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
extern int MA.Period=14;
extern int MA.Type=MODE_SMA;
extern int MA.Price=PRICE_CLOSE;
extern int MA.Shift=0;
extern bool DrawDots=true;
extern int SignalSize=3;
int init()
  {
//---- indicators
   SetIndexStyle(0,DRAW_LINE,STYLE_SOLID,SignalSize);
   SetIndexBuffer(0,MA);
   if(DrawDots){
   SetIndexStyle(1,DRAW_ARROW,STYLE_SOLID,SignalSize);
   SetIndexArrow(1,108);
   SetIndexBuffer(1,MA.up);
   SetIndexEmptyValue(1,0.0);
   SetIndexStyle(2,DRAW_ARROW,STYLE_SOLID,SignalSize);
   SetIndexArrow(2,108);
   SetIndexBuffer(2,MA.do);
   SetIndexEmptyValue(2,0.0);
   }else{
      SetIndexStyle(1,DRAW_LINE,STYLE_SOLID,SignalSize);
      SetIndexBuffer(1,MA.up);
      SetIndexStyle(2,DRAW_LINE,STYLE_SOLID,SignalSize);
      SetIndexBuffer(2,MA.do);
   }
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator deinitialization function                       |
//+------------------------------------------------------------------+
int deinit()
  {
//----
   
//----
   return(0);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int start()
  {
   int    counted_bars=IndicatorCounted();
//----
   for(int i=Bars-counted_bars-1;i>=0;i--){
      MA[i]=iMA(Symbol(),Period(),MA.Period,MA.Shift,MA.Type,MA.Price,i);
      if(MA[i]>MA[i+1]){
         MA.up[i]=MA[i];
         MA.do[i]=0;
      }else{
         MA.up[i]=0;
         MA.do[i]=MA[i];      
      }
   }
//----
   Comment("when-money-makes-money.com");
   return(0);
  }
//+------------------------------------------------------------------+
 
zzuegg:

add: see this example of a colored MA. You can switch between dot and line style drawing...


Thank you very much
New comment
Reason: