//+——————————————————————+
//| Demo_FileReadBool.mq5 |
//| Copyright 2013, MetaQuotes Software Corp. |
//| https://www.mql5.com |
//+——————————————————————+
#property copyright “Copyright 2013, MetaQuotes Software Corp.”
#property link “https://www.mql5.com”
#property version “1.00”
#property indicator_chart_window
#property indicator_buffers 2
//—- plot Label1
#property indicator_label1 “UpSignal”
#property indicator_type1 DRAW_ARROW
#property indicator_color1 clrRed
#property indicator_style1 STYLE_SOLID
#property indicator_width1 4
//—- plot Label2
#property indicator_label2 “DownSignal”
#property indicator_type2 DRAW_ARROW
#property indicator_color2 clrRed
#property indicator_style2 STYLE_SOLID
#property indicator_width2 4
//— parameters for data reading
input string InpFileName=“MACD.csv”; // file name
input string InpDirectoryName=“Data”; // directory name
//— global variables
int ind=0; // index
double upbuff[]; // indicator buffers of up arrows
double downbuff[]; // indicator buffer of down arrows
bool sign_buff[]; // signal array (true – buy, false – sell)
datetime time_buff[]; // array of signals’ arrival time
int size=0; // size of signal arrays
//+——————————————————————+
//| Custom indicator initialization function |
//+——————————————————————+
int OnInit()
{
//— open the file
ResetLastError();
int file_handle=FileOpen(InpDirectoryName+“//”+InpFileName,FILE_READ|FILE_CSV);
if(file_handle!=INVALID_HANDLE)
{
PrintFormat(“%s file is open for reading”,InpFileName);
//— first, read the number of signals
size=(int)FileReadNumber(file_handle);
//— allocate memory for the arrays
ArrayResize(sign_buff,size);
ArrayResize(time_buff,size);
//— read data from the file
for(int i=0;i<size;i++)
{
//— signal time
time_buff[i]=FileReadDatetime(file_handle);
//— signal value
sign_buff[i]=FileReadBool(file_handle);
}
//— close the file
FileClose(file_handle);
}
else
{
PrintFormat(“Failed to open %s file, Error code = %d”,InpFileName,GetLastError());
return(INIT_FAILED);
}
//— binding the arrays
SetIndexBuffer(0,upbuff,INDICATOR_DATA);
SetIndexBuffer(1,downbuff,INDICATOR_DATA);
//— set the symbol code for drawing in PLOT_ARROW
PlotIndexSetInteger(0,PLOT_ARROW,241);
PlotIndexSetInteger(1,PLOT_ARROW,242);
//—- set the indicator values that will not be seen on the chart
PlotIndexSetDouble(0,PLOT_EMPTY_VALUE,0);
PlotIndexSetDouble(1,PLOT_EMPTY_VALUE,0);
//—
return(INIT_SUCCEEDED);
}
//+——————————————————————+
//| 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[])
{
ArraySetAsSeries(time,false);
ArraySetAsSeries(low,false);
ArraySetAsSeries(high,false);
//— the loop for the bars that have not been handled yet
for(int i=prev_calculated;i<rates_total;i++)
{
//— 0 by default
upbuff[i]=0;
downbuff[i]=0;
//— check if any data is still present
if(ind<size)
{
for(int j=ind;j<size;j++)
{
//— if dates coincide, use the value from the file
if(time[i]==time_buff[j])
{
//— draw the arrow according to the signal
if(sign_buff[j])
upbuff[i]=high[i];
else
downbuff[i]=low[i];
//— increase the counter
ind=j+1;
break;
}
}
}
}
//— return value of prev_calculated for next call
return(rates_total);
} |