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CHO Smoothed Arrow 2
ÿþ//+------------------------------------------------------------------+
//| CHO Smoothed Arrow 2.mq5 |
//| Copyright © 2022, Vladimir Karputov |
//| https://www.mql5.com/en/users/barabashkakvn |
//+------------------------------------------------------------------+
#property copyright "Copyright © 2022, Vladimir Karputov"
#property link "https://www.mql5.com/en/users/barabashkakvn"
#property version "2.000"
#property indicator_chart_window
#property indicator_buffers 4
#property indicator_plots 2
//--- plot Up
#property indicator_label1 "Up"
#property indicator_type1 DRAW_ARROW
#property indicator_color1 clrDodgerBlue
#property indicator_style1 STYLE_SOLID
#property indicator_width1 1
//--- plot Down
#property indicator_label2 "Down"
#property indicator_type2 DRAW_ARROW
#property indicator_color2 clrTomato
#property indicator_style2 STYLE_SOLID
#property indicator_width2 1
//--- input parameters
input group "Chaikin Oscillator, CHO"
input int Inp_CHO_fast_ma_period = 3; // CHO: fast period
input int Inp_CHO_slow_ma_period = 10; // CHO: slow period
input ENUM_MA_METHOD Inp_CHO_ma_method = MODE_EMA; // CHO: smoothing type
input ENUM_APPLIED_VOLUME Inp_CHO_applied_volume = VOLUME_TICK; // CHO: type of volume
input group "MA"
input int Inp_MA_ma_period = 6; // MA: averaging period
input ENUM_MA_METHOD Inp_MA_ma_method = MODE_SMA; // MA: smoothing type
input ENUM_APPLIED_PRICE Inp_MA_applied_price = PRICE_CLOSE; // MA: type of price
input group "Arrows"
input uchar Inp_Up_ArrowCode = 200; // Arrow 'Up': code (font Wingdings)
input int Inp_Up_ArrowShift = 10; // Arrow 'Up': vertical shift in pixel
input uchar Inp_Down_ArrowCode = 202; // Arrow 'Down': code (font Wingdings)
input int Inp_Down_ArrowShift = 10; // Arrow 'Down': vertical shift in pixel
//--- indicator buffers
double UpBuffer[];
double DownBuffer[];
double CHOBuffer[];
double CHO_SmoothedBuffer[];
//---
int handle_iChaikin; // variable for storing the handle of the iChaikin indicator
int handle_iMA_iChaikin; // variable for storing the handle of the iChaikin indicator
int bars_calculated=0; // we will keep the number of values in the Moving Average indicator
bool m_init_error=false; // error on InInit
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int OnInit()
{
//--- indicator buffers mapping
SetIndexBuffer(0,UpBuffer,INDICATOR_DATA);
SetIndexBuffer(1,DownBuffer,INDICATOR_DATA);
SetIndexBuffer(2,CHOBuffer,INDICATOR_CALCULATIONS);
SetIndexBuffer(3,CHO_SmoothedBuffer,INDICATOR_CALCULATIONS);
//--- setting a code from the Wingdings charset as the property of PLOT_ARROW
PlotIndexSetInteger(0,PLOT_ARROW,Inp_Up_ArrowCode);
PlotIndexSetInteger(1,PLOT_ARROW,Inp_Down_ArrowCode);
//--- set the vertical shift of arrows in pixels
PlotIndexSetInteger(0,PLOT_ARROW_SHIFT,Inp_Up_ArrowShift);
PlotIndexSetInteger(1,PLOT_ARROW_SHIFT,-Inp_Down_ArrowShift);
//--- an empty value for plotting, for which there is no drawing
PlotIndexSetDouble(0,PLOT_EMPTY_VALUE,0.0);
PlotIndexSetDouble(1,PLOT_EMPTY_VALUE,0.0);
//--- set accuracy
IndicatorSetInteger(INDICATOR_DIGITS,0);
//--- create handle of the indicator iChaikin
handle_iChaikin=iChaikin(Symbol(),Period(),Inp_CHO_fast_ma_period,
Inp_CHO_slow_ma_period,Inp_CHO_ma_method,Inp_CHO_applied_volume);
//--- if the handle is not created
if(handle_iChaikin==INVALID_HANDLE)
{
//--- tell about the failure and output the error code
PrintFormat("Failed to create handle of the iChaikin indicator for the symbol %s/%s, error code %d",
Symbol(),
EnumToString(Period()),
GetLastError());
//--- the indicator is stopped early
m_init_error=true;
return(INIT_SUCCEEDED);
}
//--- create handle of the indicator iMA
handle_iMA_iChaikin=iMA(Symbol(),Period(),Inp_MA_ma_period,0,
Inp_MA_ma_method,handle_iChaikin);
//--- if the handle is not created
if(handle_iMA_iChaikin==INVALID_HANDLE)
{
//--- tell about the failure and output the error code
PrintFormat("Failed to create handle of the iMA iChaikin indicator for the symbol %s/%s, error code %d",
Symbol(),
EnumToString(Period()),
GetLastError());
//--- the indicator is stopped early
m_init_error=true;
return(INIT_SUCCEEDED);
}
//--- MA
string mode;
switch(Inp_MA_ma_method)
{
case MODE_EMA :
mode="EMA";
break;
case MODE_LWMA :
mode="LWMA";
break;
case MODE_SMA :
mode="SMA";
break;
case MODE_SMMA :
mode="SMMA";
break;
default :
mode="unknown mode";
}
string price;
switch(Inp_MA_applied_price)
{
case PRICE_CLOSE:
price="Close";
break;
case PRICE_OPEN:
price="Open";
break;
case PRICE_HIGH:
price="High";
break;
case PRICE_LOW:
price="Low";
break;
case PRICE_MEDIAN:
price="Median";
break;
case PRICE_TYPICAL:
price="Typical";
break;
case PRICE_WEIGHTED:
price="Weighted";
break;
default:
price="unknown ma price";
}
//--- name for indicator subwindow label
string short_name=StringFormat("CHO(slow %d,fast %d) Smoothed(%d,%s,%s) Arrow",
Inp_CHO_slow_ma_period,Inp_CHO_fast_ma_period,Inp_MA_ma_period,mode,price);
IndicatorSetString(INDICATOR_SHORTNAME,short_name);
//---
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[])
{
if(m_init_error)
return(0);
//--- number of values copied from the iChaikin indicator
int values_to_copy;
//--- determine the number of values calculated in the indicator
int calculated_cho=BarsCalculated(handle_iChaikin);
if(calculated_cho<=0)
{
PrintFormat("BarsCalculated(handle_iChaikin) returned %d, error code %d",calculated_cho,GetLastError());
return(0);
}
int calculated_ma_cho=BarsCalculated(handle_iMA_iChaikin);
if(calculated_ma_cho<=0)
{
PrintFormat("BarsCalculated(handle_iMA_iChaikin) returned %d, error code %d",calculated_ma_cho,GetLastError());
return(0);
}
if(calculated_cho!=calculated_ma_cho)
{
PrintFormat("BarsCalculated(handle_iChaikin) returned %d, BarsCalculated(handle_iMA_iChaikin) returned %d",calculated_cho,calculated_ma_cho);
return(0);
}
int calculated=calculated_cho;
//--- if it is the first start of calculation of the indicator or if the number of values in the iChaikin 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 iChaikinBuffer array is greater than the number of values in the iChaikin 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 iChaikinBuffer array with values of the Chaikin Oscillator indicator
//--- if FillArrayFromBuffer returns false, it means the information is nor ready yet, quit operation
if(!FillArrayFromBuffer(CHOBuffer,handle_iChaikin,values_to_copy))
return(0);
if(!FillArrayFromBuffer(CHO_SmoothedBuffer,handle_iMA_iChaikin,values_to_copy))
return(0);
//--- memorize the number of values in the Chaikin Oscillator indicator
bars_calculated=calculated;
//--- main loop
if(rates_total<3)
return(0);
int limit=prev_calculated-1;
if(prev_calculated==0)
{
UpBuffer[0]=0.0;
DownBuffer[0]=0.0;
limit=1;
}
for(int i=limit; i<rates_total; i++)
{
UpBuffer[i]=0.0;
DownBuffer[i]=0.0;
if(CHOBuffer[i-1]<CHO_SmoothedBuffer[i-1] && CHOBuffer[i]>CHO_SmoothedBuffer[i])
if(CHOBuffer[i]<0.0)
UpBuffer[i]=low[i];
if(CHOBuffer[i-1]>CHO_SmoothedBuffer[i-1] && CHOBuffer[i]<CHO_SmoothedBuffer[i])
if(CHOBuffer[i]>0.0)
DownBuffer[i]=high[i];
}
//--- return value of prev_calculated for next call
return(rates_total);
}
//+------------------------------------------------------------------+
//| Filling indicator buffers from the iChaikin indicator |
//+------------------------------------------------------------------+
bool FillArrayFromBuffer(double &values[], // indicator buffer of values
int ind_handle, // handle of indicator
int amount // number of copied values
)
{
//--- reset error code
ResetLastError();
//--- fill a part of the array with values from the indicator buffer that has 0 index
if(CopyBuffer(ind_handle,0,0,amount,values)<0)
{
//--- if the copying fails, tell the error code
PrintFormat("Failed to copy data from the 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_iMA_iChaikin!=INVALID_HANDLE)
IndicatorRelease(handle_iMA_iChaikin);
if(handle_iChaikin!=INVALID_HANDLE)
IndicatorRelease(handle_iChaikin);
}
//+------------------------------------------------------------------+
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