Ich möchte selbstständig eine Expert Advisor schreiben, um besser MQL5 zu lernen.
Programmier-Grundkenntnisse besitze ich bereits, mein Wissen ist in manchen Bereichen jedoch lückenhaft.
Ich will Werte des aktuellen Up und Down-Fractals des folgenden Indikator in den Expert Advisor einbinden.
Leider schaffe ich es nicht und weiß nicht, woran es liegt.
Hier der Code des Indikators:
//+------------------------------------------------------------------+
//| X-bars_Fractals.mq5 |
//| Copyright 2011, Rone. |
//|
rone.sergey@gmail.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2011, Rone."
#property link "rone.sergey@gmail.com"
#property version "1.00"
#property description "The indicator allows to separately set the number of bars from the left and right of the fractal. Well suited "
#property description "to define local and global extremums."
//--- indicator buffers
#property indicator_chart_window
#property indicator_buffers 2
#property indicator_plots 2
//--- plot UpFractals
#property indicator_label1 "Up Fractals"
#property indicator_type1 DRAW_ARROW
#property indicator_color1 clrDodgerBlue
#property indicator_style1 STYLE_SOLID
#property indicator_width1 1
//--- plot DnFractals
#property indicator_label2 "Down Fractals"
#property indicator_type2 DRAW_ARROW
#property indicator_color2 clrTomato
#property indicator_style2 STYLE_SOLID
#property indicator_width2 1
//--- input parameters
input int InpLeftSide = 3; // Number of bars from the left of fractal
input int InpRightSide = 3; // Number of bars from the right of fractal
//--- indicator buffers
double UpFractalsBuffer[];
double DnFractalsBuffer[];
//--- global variables
int minRequiredBars;
int leftSide, rightSide;
int maxSide;
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int OnInit() {
//---
if ( InpLeftSide < 1 ) {
leftSide = 2;
printf("The \"Number of bars from the left of fractal\" parameter is specified incorrectly: %d. the: %d. value will be used",
InpLeftSide, leftSide);
} else {
leftSide = InpLeftSide;
}
if ( InpRightSide < 1 ) {
rightSide = 2;
printf("The \"Number of bars from the right of fractal\" parameter is specified incorrectly: %d. the: %d. value will be used",
InpRightSide, rightSide);
} else {
rightSide = InpRightSide;
}
//---
minRequiredBars = leftSide + rightSide + 1;
maxSide = int(MathMax(leftSide, rightSide));
//---
SetIndexBuffer(0, UpFractalsBuffer, INDICATOR_DATA);
SetIndexBuffer(1, DnFractalsBuffer, INDICATOR_DATA);
//---
PlotIndexSetInteger(0, PLOT_ARROW, 217);
PlotIndexSetInteger(1, PLOT_ARROW, 218);
//---
PlotIndexSetInteger(0, PLOT_ARROW_SHIFT, -10);
PlotIndexSetInteger(1, PLOT_ARROW_SHIFT, 10);
//---
for ( int i = 0; i < 2; i++ ) {
PlotIndexSetInteger(i, PLOT_DRAW_BEGIN, minRequiredBars);
PlotIndexSetDouble(i, PLOT_EMPTY_VALUE, 0.0);
}
//---
IndicatorSetInteger(INDICATOR_DIGITS, _Digits);
//---
IndicatorSetString(INDICATOR_SHORTNAME, "X-bars Fractals ("+(string)leftSide+", "+(string)rightSide+")");
//---
return(0);
}
//+------------------------------------------------------------------+
//| Check if is Up Fractal function |
//+------------------------------------------------------------------+
bool isUpFractal(int bar, int max, const double &High[]) {
//---
for ( int i = 1; i <= max; i++ ) {
if ( i <= leftSide && High[bar] < High[bar-i] ) {
return(false);
}
if ( i <= rightSide && High[bar] <= High[bar+i] ) {
return(false);
}
}
//---
return(true);
}
//+------------------------------------------------------------------+
//| Check if is Down Fractal function |
//+------------------------------------------------------------------+
bool isDnFractal(int bar, int max, const double &Low[]) {
//---
for ( int i = 1; i <= max; i++ ) {
if ( i <= leftSide && Low[bar] > Low[bar-i] ) {
return(false);
}
if ( i <= rightSide && Low[bar] >= Low[bar+i] ) {
return(false);
}
}
//---
return(true);
}
//+------------------------------------------------------------------+
//| Custom indicator iteration function |
//+------------------------------------------------------------------+
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 startBar, lastBar;
//---
if ( rates_total < minRequiredBars ) {
Print("Not enough data to calculate");
return(0);
}
//---
if (prev_calculated < minRequiredBars) {
startBar = leftSide;
ArrayInitialize(UpFractalsBuffer, 0.0);
ArrayInitialize(DnFractalsBuffer, 0.0);
}
else {
startBar = rates_total - minRequiredBars;
}
//---
lastBar = rates_total - rightSide;
for ( int bar = startBar; bar < lastBar && !IsStopped(); bar++ ) {
//---
if ( isUpFractal(bar, maxSide, high) ) {
UpFractalsBuffer[bar] = high[bar];
} else {
UpFractalsBuffer[bar] = 0.0;
}
//---
if ( isDnFractal(bar, maxSide, low) ) {
DnFractalsBuffer[bar] = low[bar];
} else {
DnFractalsBuffer[bar] = 0.0;
}
}
//--- return value of prev_calculated for next call
return(rates_total);
}
//+------------------------------------------------------------------+