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加2句代码，分别把高点之间依次画线，低点之间依次画线。
下图是我手工画的
//+------------------------------------------------------------------+
//| ZigZag.mq4 |
//| Copyright 2006-2014, MetaQuotes Software Corp. |
//| http://www.mql4.com |
//+------------------------------------------------------------------+
#property copyright "2006-2014, MetaQuotes Software Corp."
#property link "http://www.mql4.com"
#property strict
#property indicator_chart_window
#property indicator_buffers 1
#property indicator_color1 Red
//---- indicator parameters
input int InpDepth=12; // Depth
input int InpDeviation=5; // Deviation
input int InpBackstep=3; // Backstep
//---- indicator buffers
double ExtZigzagBuffer[];
double ExtHighBuffer[];
double ExtLowBuffer[];
//--- globals
int ExtLevel=3; // recounting's depth of extremums
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int OnInit()
{
if(InpBackstep>=InpDepth)
{
Print("Backstep cannot be greater or equal to Depth");
return(INIT_FAILED);
}
//--- 2 additional buffers
IndicatorBuffers(3);
//---- drawing settings
SetIndexStyle(0,DRAW_SECTION);
//---- indicator buffers
SetIndexBuffer(0,ExtZigzagBuffer);
SetIndexBuffer(1,ExtHighBuffer);
SetIndexBuffer(2,ExtLowBuffer);
SetIndexEmptyValue(0,0.0);
//---- indicator short name
IndicatorShortName("ZigZag("+string(InpDepth)+","+string(InpDeviation)+","+string(InpBackstep)+")");
//---- initialization done
return(INIT_SUCCEEDED);
}
//+------------------------------------------------------------------+
//| |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
const int prev_calculated,
const datetime &time[],
const double &open[],
const double &high[],
const double &low[],
const double &close[],
const long& tick_volume[],
const long& volume[],
const int& spread[])
{
int i,limit,counterZ,whatlookfor=0;
int back,pos,lasthighpos=0,lastlowpos=0;
double extremum;
double curlow=0.0,curhigh=0.0,lasthigh=0.0,lastlow=0.0;
//--- check for history and inputs
if(rates_total<InpDepth || InpBackstep>=InpDepth)
return(0);
//--- first calculations
if(prev_calculated==0)
limit=InitializeAll();
else
{
//--- find first extremum in the depth ExtLevel or 100 last bars
i=counterZ=0;
while(counterZ<ExtLevel && i<100)
{
if(ExtZigzagBuffer!=0.0)
counterZ++;
i++;
}
//--- no extremum found - recounting all from begin
if(counterZ==0)
limit=InitializeAll();
else
{
//--- set start position to found extremum position
limit=i-1;
//--- what kind of extremum?
if(ExtLowBuffer!=0.0)
{
//--- low extremum
curlow=ExtLowBuffer;
//--- will look for the next high extremum
whatlookfor=1;
}
else
{
//--- high extremum
curhigh=ExtHighBuffer;
//--- will look for the next low extremum
whatlookfor=-1;
}
//--- clear the rest data
for(i=limit-1; i>=0; i--)
{
ExtZigzagBuffer=0.0;
ExtLowBuffer=0.0;
ExtHighBuffer=0.0;
}
}
}
//--- main loop
for(i=limit; i>=0; i--)
{
//--- find lowest low in depth of bars
extremum=low[iLowest(NULL,0,MODE_LOW,InpDepth,i)];
//--- this lowest has been found previously
if(extremum==lastlow)
extremum=0.0;
else
{
//--- new last low
lastlow=extremum;
//--- discard extremum if current low is too high
if(low-extremum>InpDeviation*Point)
extremum=0.0;
else
{
//--- clear previous extremums in backstep bars
for(back=1; back<=InpBackstep; back++)
{
pos=i+back;
if(ExtLowBuffer[pos]!=0 && ExtLowBuffer[pos]>extremum)
ExtLowBuffer[pos]=0.0;
}
}
}
//--- found extremum is current low
if(low==extremum)
ExtLowBuffer=extremum;
else
ExtLowBuffer=0.0;
//--- find highest high in depth of bars
extremum=high[iHighest(NULL,0,MODE_HIGH,InpDepth,i)];
//--- this highest has been found previously
if(extremum==lasthigh)
extremum=0.0;
else
{
//--- new last high
lasthigh=extremum;
//--- discard extremum if current high is too low
if(extremum-high>InpDeviation*Point)
extremum=0.0;
else
{
//--- clear previous extremums in backstep bars
for(back=1; back<=InpBackstep; back++)
{
pos=i+back;
if(ExtHighBuffer[pos]!=0 && ExtHighBuffer[pos]<extremum)
ExtHighBuffer[pos]=0.0;
}
}
}
//--- found extremum is current high
if(high==extremum)
ExtHighBuffer=extremum;
else
ExtHighBuffer=0.0;
}
//--- final cutting
if(whatlookfor==0)
{
lastlow=0.0;
lasthigh=0.0;
}
else
{
lastlow=curlow;
lasthigh=curhigh;
}
for(i=limit; i>=0; i--)
{
switch(whatlookfor)
{
case 0: // look for peak or lawn
if(lastlow==0.0 && lasthigh==0.0)
{
if(ExtHighBuffer!=0.0)
{
lasthigh=High;
lasthighpos=i;
whatlookfor=-1;
ExtZigzagBuffer=lasthigh;
}
if(ExtLowBuffer!=0.0)
{
lastlow=Low;
lastlowpos=i;
whatlookfor=1;
ExtZigzagBuffer=lastlow;
}
}
break;
case 1: // look for peak
if(ExtLowBuffer!=0.0 && ExtLowBuffer<lastlow && ExtHighBuffer==0.0)
{
ExtZigzagBuffer[lastlowpos]=0.0;
lastlowpos=i;
lastlow=ExtLowBuffer;
ExtZigzagBuffer=lastlow;
}
if(ExtHighBuffer!=0.0 && ExtLowBuffer==0.0)
{
lasthigh=ExtHighBuffer;
lasthighpos=i;
ExtZigzagBuffer=lasthigh;
whatlookfor=-1;
}
break;
case -1: // look for lawn
if(ExtHighBuffer!=0.0 && ExtHighBuffer>lasthigh && ExtLowBuffer==0.0)
{
ExtZigzagBuffer[lasthighpos]=0.0;
lasthighpos=i;
lasthigh=ExtHighBuffer;
ExtZigzagBuffer=lasthigh;
}
if(ExtLowBuffer!=0.0 && ExtHighBuffer==0.0)
{
lastlow=ExtLowBuffer;
lastlowpos=i;
ExtZigzagBuffer=lastlow;
whatlookfor=1;
}
break;
}
}
//--- done
return(rates_total);
}
//+------------------------------------------------------------------+
//| |
//+------------------------------------------------------------------+
int InitializeAll()
{
ArrayInitialize(ExtZigzagBuffer,0.0);
ArrayInitialize(ExtHighBuffer,0.0);
ArrayInitialize(ExtLowBuffer,0.0);
//--- first counting position
return(Bars-InpDepth);
}
//+------------------------------------------------------------------+ |
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发表于 2017-12-17 13:35
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