where can i find the souce code of iVolume function ?
how to identify the up and down values ,they have different colors on chart .
That is not caused by iVolume(..) the internal function of mt4. On my (mt4-) charts the volume is just a little vertical line in th colore I define in the chart-properties.
It seems you have an separate indicator - in this case you have to gogle for it or search here in the code base of this indicator.
the volume indicator is in navagator---->indicator---->volume---->volumes
the indicator has only one line index, but has two color ,very puzzle.
where can i find the souce code of iVolume function ?
You asked for the source code for iVolume function
Now you are referring to an indicator
the volume indicator is in navagator---->indicator---->volume---->volumes
the indicator has only one line index, but has two color ,very puzzle.
I don't know where you can view the code for this indicator
The colours are dependant on whether the bar's volume is higher or lower than the previous bar's
I found an old copy. Call it "Vol" so as to preserve the current version.
//+------------------------------------------------------------------+ //| Vol.mq4 | //| Copyright © 2005, MetaQuotes Software Corp. | //| http://www.metaquotes.net/ | //+------------------------------------------------------------------+ #property copyright "Copyright © 2005, MetaQuotes Software Corp." #property link "http://www.metaquotes.net/" //---- indicator settings #property indicator_separate_window #property indicator_minimum 0 #property indicator_buffers 3 #property indicator_color1 Black #property indicator_color2 Green #property indicator_color3 Red #property indicator_width2 2 #property indicator_width3 2 //---- indicator buffers double ExtVolumesBuffer[]; double ExtVolumesUpBuffer[]; double ExtVolumesDownBuffer[]; //+------------------------------------------------------------------+ //| Custom indicator initialization function | //+------------------------------------------------------------------+ int init() { //---- indicator buffers mapping SetIndexBuffer(0,ExtVolumesBuffer); SetIndexBuffer(1,ExtVolumesUpBuffer); SetIndexBuffer(2,ExtVolumesDownBuffer); //---- drawing settings SetIndexStyle(0,DRAW_NONE); SetIndexStyle(1,DRAW_HISTOGRAM); SetIndexStyle(2,DRAW_HISTOGRAM); //---- sets default precision format for indicators visualization IndicatorDigits(0); //---- name for DataWindow and indicator subwindow label IndicatorShortName("Volumes"); SetIndexLabel(0,"Volumes"); SetIndexLabel(1,NULL); SetIndexLabel(2,NULL); //---- sets drawing line empty value SetIndexEmptyValue(1,0.0); SetIndexEmptyValue(2,0.0); //---- initialization done return(0); } //+------------------------------------------------------------------+ //| Volumes | //+------------------------------------------------------------------+ int start() { int i,nLimit,nCountedBars; //---- bars count that does not changed after last indicator launch. nCountedBars=IndicatorCounted(); //---- last counted bar will be recounted if(nCountedBars>0) nCountedBars--; nLimit=Bars-nCountedBars; //---- for(i=0; i<nLimit; i++) { double dVolume=Volume[i]; if(i==Bars-1 || Open[i]<Close[i]) { ExtVolumesBuffer[i]=dVolume; ExtVolumesUpBuffer[i]=dVolume; ExtVolumesDownBuffer[i]=0.0; } else { ExtVolumesBuffer[i]=dVolume; ExtVolumesUpBuffer[i]=0.0; ExtVolumesDownBuffer[i]=dVolume; } } //---- done return(0); } //+------------------------------------------------------------------+
thank you ,
it seems the color has changed its rule .
in old version ,color is detemined by OPEN and CLOSE price , now is by volume itself .
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where can i find the souce code of iVolume function ?