Changing chart color

[fx-analysis]

Hi,

Is it possible to change chart color in MetaTrader 4 ?

For example,

is Macd > 0, color Green

is Macd < 0, color Red

Thanks !

[brewmanz]

No, and ..... yes!

Use *TWO* indicators. Or 4, like this. It uses 2 colours, and also 2 bar widths to show whether signal line is within the bars range ...

#property  indicator_color1  Green
#property  indicator_color2  Red
#property  indicator_color3  Maroon
#property  indicator_width1  3
#property  indicator_width2  1
#property  indicator_width3  3
...
double     MacdBufferRising[];
double     MacdBufferFalling[];
double     MacdBufferRisingThin[];
double     MacdBufferFallingThin[];
double     MacdBufferRaw[];
double     SignalBuffer[];
...
   IndicatorBuffers(8);
   SetIndexStyle(0,DRAW_HISTOGRAM, indicator_style1, indicator_width1, indicator_color1);
   SetIndexStyle(1,DRAW_LINE, indicator_style2, indicator_width2, indicator_color2);
   SetIndexStyle(2,DRAW_HISTOGRAM, indicator_style3, indicator_width3, indicator_color3);
   SetIndexStyle(3,DRAW_HISTOGRAM, indicator_style1, indicator_width1-1, indicator_color1);
   SetIndexStyle(4,DRAW_HISTOGRAM, indicator_style3, indicator_width3-1, indicator_color3);
   SetIndexStyle(7,DRAW_NONE);
...
   SetIndexBuffer(0,MacdBufferRising);
   SetIndexBuffer(1,SignalBuffer);
   SetIndexBuffer(2,MacdBufferFalling);
   SetIndexBuffer(3,MacdBufferRisingThin);
   SetIndexBuffer(4,MacdBufferFallingThin);
   SetIndexBuffer(5,MacdBufferRaw);
...
   for(int ix=ixLimit; ix>=0; ix--)
   {
      MacdBufferRising[ix]=EMPTY_VALUE;
      MacdBufferRisingThin[ix]=EMPTY_VALUE;
      MacdBufferFalling[ix]=EMPTY_VALUE;
      MacdBufferFallingThin[ix]=EMPTY_VALUE;
      SignalBuffer[ix]=EMPTY_VALUE;

      rawM=iMA(NULL,0,FastPeriods,0,FastMAMode_0SmaEmaSmmaLwma3,FastPrice_0COHLMedTypWgt6,ix)-
           iMA(NULL,0,SlowPeriods,0,SlowMAMode_0SmaEmaSmmaLwma3,SlowPrice_0COHLMedTypWgt6,ix);
      MacdBufferRaw[ix]=rawM;

      rawS=iMAOnArray(MacdBufferRaw,0,SignalPeriods,0,SignalMAMode_0SmaEmaSmmaLwma3,ix);
      if(rawS != EMPTY_VALUE)
         SignalBuffer[ix]=ValueCompress(rawS, PeakCompressionRatio);

      bool isThin = false;
      if(rawS * rawM > 0)  // if both same side of zero ..
         if(MathAbs(rawS) > MathAbs(rawM))   // signal clear of MACD bars
            isThin = true;
      if(rawM > MacdBufferRaw[ix+1])
         if(isThin)
            MacdBufferRisingThin[ix]=ValueCompress(rawM, PeakCompressionRatio);
         else
            MacdBufferRising[ix]=ValueCompress(rawM, PeakCompressionRatio);
      else
         if(isThin)
            MacdBufferFallingThin[ix]=ValueCompress(rawM, PeakCompressionRatio);
         else
            MacdBufferFalling[ix]=ValueCompress(rawM, PeakCompressionRatio);
   }

Oops - ignore ValueCompress - it makes small histogram bars easier to see by compressing the long ones.