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Two iRSIs in one subwindow
ÿþ//+------------------------------------------------------------------+
//| Two iRSIs in one subwindow.mq5 |
//| Copyright © 2020, Vladimir Karputov |
//| https://www.mql5.com/ru/market/product/43161 |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2020, Vladimir Karputov"
#property link "https://www.mql5.com/ru/market/product/43161"
#property version "1.000"
#property indicator_separate_window
#property indicator_minimum 0
#property indicator_maximum 100
#property indicator_level1 30
#property indicator_level2 70
#property indicator_buffers 2
#property indicator_plots 2
//--- plot RSI_Fast
#property indicator_label1 "RSI Fast"
#property indicator_type1 DRAW_LINE
#property indicator_color1 clrBlue
#property indicator_style1 STYLE_SOLID
#property indicator_width1 1
//--- plot RSI_Slow
#property indicator_label2 "RSI Slow"
#property indicator_type2 DRAW_LINE
#property indicator_color2 clrRed
#property indicator_style2 STYLE_SOLID
#property indicator_width2 1
//--- input parameters
input group "RSI Fast and Slow"
input int Inp_RSI_Fast_ma_period = 3; // RSI Fast: averaging period
input ENUM_APPLIED_PRICE Inp_RSI_Fast_applied_price= PRICE_CLOSE; // RSI Fast: type of price
input int Inp_RSI_Slow_ma_period = 14; // RSI Slow: averaging period
input ENUM_APPLIED_PRICE Inp_RSI_Slow_applied_price= PRICE_CLOSE; // RSI Slow: type of price
//--- indicator buffers
double RSI_FastBuffer[];
double RSI_SlowBuffer[];
//---
int handle_iRSI_Fast; // variable for storing the handle of the iRSI indicator
int handle_iRSI_Slow; // variable for storing the handle of the iRSI indicator
int bars_calculated=0; // we will keep the number of values in the Relative Strength Index indicator
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int OnInit()
{
//--- indicator buffers mapping
SetIndexBuffer(0,RSI_FastBuffer,INDICATOR_DATA);
SetIndexBuffer(1,RSI_SlowBuffer,INDICATOR_DATA);
//--- set accuracy
IndicatorSetInteger(INDICATOR_DIGITS,2);
//--- sets first bar from what index will be drawn
PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,Inp_RSI_Fast_ma_period);
PlotIndexSetInteger(1,PLOT_DRAW_BEGIN,Inp_RSI_Slow_ma_period);
//--- name for DataWindow and indicator subwindow label
PlotIndexSetString(0,PLOT_LABEL,"RSI Fast("+IntegerToString(Inp_RSI_Fast_ma_period)+","+EnumToString(Inp_RSI_Fast_applied_price)+")");
PlotIndexSetString(1,PLOT_LABEL,"RSI Slow("+IntegerToString(Inp_RSI_Slow_ma_period)+","+EnumToString(Inp_RSI_Slow_applied_price)+")");
//--- create handle of the indicator iRSI
handle_iRSI_Fast=iRSI(Symbol(),Period(),Inp_RSI_Fast_ma_period,Inp_RSI_Fast_applied_price);
//--- if the handle is not created
if(handle_iRSI_Fast==INVALID_HANDLE)
{
//--- tell about the failure and output the error code
PrintFormat("Failed to create handle of the iRSI indicator ('Fast') for the symbol %s/%s, error code %d",
Symbol(),
EnumToString(Period()),
GetLastError());
//--- the indicator is stopped early
return(INIT_FAILED);
}
//--- create handle of the indicator iRSI
handle_iRSI_Slow=iRSI(Symbol(),Period(),Inp_RSI_Slow_ma_period,Inp_RSI_Slow_applied_price);
//--- if the handle is not created
if(handle_iRSI_Slow==INVALID_HANDLE)
{
//--- tell about the failure and output the error code
PrintFormat("Failed to create handle of the iRSI indicator ('FSlowast') for the symbol %s/%s, error code %d",
Symbol(),
EnumToString(Period()),
GetLastError());
//--- the indicator is stopped early
return(INIT_FAILED);
}
//---
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[])
{
//--- number of values copied from the iRSI indicator
int values_to_copy;
//--- determine the number of values calculated in the indicator
ResetLastError();
int calculated_fast=BarsCalculated(handle_iRSI_Fast);
if(calculated_fast<=0)
{
PrintFormat("BarsCalculated(handle_iRSI_Fast) returned %d, error code %d",calculated_fast,GetLastError());
return(0);
}
ResetLastError();
int calculated_slow=BarsCalculated(handle_iRSI_Slow);
if(calculated_slow<=0)
{
PrintFormat("BarsCalculated(handle_iRSI_Slow) returned %d, error code %d",calculated_slow,GetLastError());
return(0);
}
if(calculated_fast!=calculated_slow)
{
PrintFormat("BarsCalculated(handle_iRSI_Fast) returned %d, BarsCalculated(handle_iRSI_Slow) returned %d",calculated_fast,calculated_slow);
return(0);
}
int calculated=calculated_fast;
//--- if it is the first start of calculation of the indicator or if the number of values in the iRSI indicator changed
//---or if it is necessary to calculated the indicator for two or more bars (it means something has changed in the price history)
if(prev_calculated==0 || calculated!=bars_calculated || rates_total>prev_calculated+1)
{
//--- if the iRSIBuffer array is greater than the number of values in the iRSI indicator for symbol/period, then we don't copy everything
//--- otherwise, we copy less than the size of indicator buffers
if(calculated>rates_total)
values_to_copy=rates_total;
else
values_to_copy=calculated;
}
else
{
//--- it means that it's not the first time of the indicator calculation, and since the last call of OnCalculate()
//--- for calculation not more than one bar is added
values_to_copy=(rates_total-prev_calculated)+1;
}
//--- fill the array with values of the iRSI indicator
//--- if FillArrayFromBuffer returns false, it means the information is nor ready yet, quit operation
if(!FillArrayFromBuffer(RSI_FastBuffer,handle_iRSI_Fast,values_to_copy))
return(0);
if(!FillArrayFromBuffer(RSI_SlowBuffer,handle_iRSI_Slow,values_to_copy))
return(0);
//--- memorize the number of values in the Relative Strength Index indicator
bars_calculated=calculated;
//--- return value of prev_calculated for next call
return(rates_total);
}
//+------------------------------------------------------------------+
//| Filling indicator buffers from the iRSI indicator |
//+------------------------------------------------------------------+
bool FillArrayFromBuffer(double &rsi_buffer[], // indicator buffer of Relative Strength Index values
int ind_handle, // handle of the iRSI indicator
int amount // number of copied values
)
{
//--- reset error code
ResetLastError();
//--- fill a part of the iRSIBuffer array with values from the indicator buffer that has 0 index
if(CopyBuffer(ind_handle,0,0,amount,rsi_buffer)<0)
{
//--- if the copying fails, tell the error code
PrintFormat("Failed to copy data from the iRSI indicator, error code %d",GetLastError());
//--- quit with zero result - it means that the indicator is considered as not calculated
return(false);
}
//--- everything is fine
return(true);
}
//+------------------------------------------------------------------+
//| Indicator deinitialization function |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
{
if(handle_iRSI_Fast!=INVALID_HANDLE)
IndicatorRelease(handle_iRSI_Fast);
if(handle_iRSI_Slow!=INVALID_HANDLE)
IndicatorRelease(handle_iRSI_Slow);
}
//+------------------------------------------------------------------+
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