//+------------------------------------------------------------------+
//| Negative_Volume_Index.mq5 |
//| Copyright © 2011, Nikolay Kositsin |
//| Khabarovsk, farria@mail.redcom.ru |
//+------------------------------------------------------------------+
//--- àâòîðñòâî èíäèêàòîðà
#property copyright "Copyright © 2011, Nikolay Kositsin"
//--- ññûëêà íà ñàéò àâòîðà
#property link "farria@mail.redcom.ru"
#property description "Èíäåêñ îòðèöàòåëüíîãî îáúåìà (Negative Volume Index - NVI)"
//--- íîìåð âåðñèè èíäèêàòîðà
#property version "1.01"
//--- îòðèñîâêà èíäèêàòîðà â îòäåëüíîì îêíå
#property indicator_separate_window
//--- äëÿ ðàñ÷åòà è îòðèñîâêè èíäèêàòîðà èñïîëüçîâàíî äâà áóôåðà
#property indicator_buffers 1
//--- èñïîëüçîâàíî äâà ãðàôè÷åñêèõ ïîñòðîåíèÿ
#property indicator_plots 1
//+----------------------------------------------+
//| Ïàðàìåòðû îòðèñîâêè èíäèêàòîðà |
//+----------------------------------------------+
//--- îòðèñîâêà èíäèêàòîðà 1 â âèäå ëèíèè
#property indicator_type1 DRAW_LINE
//--- â êà÷åñòâå öâåòà áû÷åé ëèíèè èíäèêàòîðà èñïîëüçîâàí êðàñíûé öâåò
#property indicator_color1 clrRed
//--- ëèíèÿ èíäèêàòîðà 1 - íåïðåðûâíàÿ êðèâàÿ
#property indicator_style1 STYLE_SOLID
//--- òîëùèíà ëèíèè èíäèêàòîðà 1 ðàâíà 1
#property indicator_width1 1
//--- îòîáðàæåíèå áû÷åé ìåòêè èíäèêàòîðà
#property indicator_label1 "Negative Volume Index"
//+----------------------------------------------+
//| Âõîäíûå ïàðàìåòðû èíäèêàòîðà |
//+----------------------------------------------+
input ENUM_APPLIED_VOLUME VolumeType=VOLUME_TICK; //îáúåì
input int Shift = 0; // ñäâèã èíäèêàòîðà ïî ãîðèçîíòàëè â áàðàõ
//+----------------------------------------------+
//--- îáúÿâëåíèå äèíàìè÷åñêèõ ìàññèâîâ, êîòîðûå áóäóò â
// äàëüíåéøåì èñïîëüçîâàíû â êà÷åñòâå èíäèêàòîðíûõ áóôåðîâ
double NVIBuffer[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
void OnInit()
{
//--- ïðåâðàùåíèå äèíàìè÷åñêîãî ìàññèâà PVIBuffer â èíäèêàòîðíûé áóôåð
SetIndexBuffer(0,NVIBuffer,INDICATOR_DATA);
//--- îñóùåñòâëåíèå ñäâèãà èíäèêàòîðà 1 ïî ãîðèçîíòàëè íà Shift
PlotIndexSetInteger(0,PLOT_SHIFT,Shift);
//--- îñóùåñòâëåíèå ñäâèãà íà÷àëà îòñ÷åòà îòðèñîâêè èíäèêàòîðà 1 íà 1
PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,1);
//--- óñòàíîâêà çíà÷åíèé èíäèêàòîðà, êîòîðûå íå áóäóò âèäèìû íà ãðàôèêå
PlotIndexSetDouble(0,PLOT_EMPTY_VALUE,0.0);
//--- ñîçäàíèå èìåíè äëÿ îòîáðàæåíèÿ â îòäåëüíîì ïîäîêíå è âî âñïëûâàþùåé ïîäñêàçêå
IndicatorSetString(INDICATOR_SHORTNAME,"Negative Volume Index");
//--- îïðåäåëåíèå òî÷íîñòè îòîáðàæåíèÿ çíà÷åíèé èíäèêàòîðà
IndicatorSetInteger(INDICATOR_DIGITS,_Digits);
//---
}
//+------------------------------------------------------------------+
//| Custom indicator iteration function |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total, // êîëè÷åñòâî èñòîðèè â áàðàõ íà òåêóùåì òèêå
const int prev_calculated,// êîëè÷åñòâî èñòîðèè â áàðàõ íà ïðåäûäóùåì òèêå
const datetime &time[],
const double &open[],
const double& high[], // öåíîâîé ìàññèâ ìàêñèìóìîâ öåíû äëÿ ðàñ÷åòà èíäèêàòîðà
const double& low[], // öåíîâîé ìàññèâ ìèíèìóìîâ öåíû äëÿ ðàñ÷åòà èíäèêàòîðà
const double &close[],
const long &tick_volume[],
const long &volume[],
const int &spread[])
{
//--- ïðîâåðêà êîëè÷åñòâà áàðîâ íà äîñòàòî÷íîñòü äëÿ ðàñ÷åòà
if(rates_total<2) return(0);
//--- îáúÿâëåíèÿ ëîêàëüíûõ ïåðåìåííûõ
int first,bar;
long Vol0,Vol1;
//--- ðàñ÷åò ñòàðòîâîãî íîìåðà first äëÿ öèêëà ïåðåñ÷åòà áàðîâ
if(prev_calculated>rates_total || prev_calculated<=0) // ïðîâåðêà íà ïåðâûé ñòàðò ðàñ÷åòà èíäèêàòîðà
{
first=1; // ñòàðòîâûé íîìåð äëÿ ðàñ÷åòà âñåõ áàðîâ
NVIBuffer[0]=1.0;
}
else first=prev_calculated-1; // ñòàðòîâûé íîìåð äëÿ ðàñ÷åòà íîâûõ áàðîâ
//--- îñíîâíîé öèêë ðàñ÷åòà èíäèêàòîðà
for(bar=first; bar<rates_total; bar++)
{
if(VolumeType==VOLUME_TICK)
{
Vol0=long(tick_volume[bar]);
Vol1=long(tick_volume[bar-1]);
}
else
{
Vol0=long(volume[bar]);
Vol1=long(volume[bar-1]);
}
if(Vol0 < Vol1) NVIBuffer[bar] = NVIBuffer[bar-1] * (1 + ((close[bar] - close[bar-1]) / close[bar-1]));
else NVIBuffer[bar] = NVIBuffer[bar-1];
}
//---
return(rates_total);
}
//+------------------------------------------------------------------+
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