'CopyBuffer' - no one of the overloads can be applied to the function call

[Alan Walker]

//+------------------------------------------------------------------+
//|                                                EMA Crossover.mq5 |
//|                        Copyright 2020, MetaQuotes Software Corp. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2023"
#property link      "https://www.mql5.com"
#property version   "1.00"
#property indicator_chart_window
#property indicator_buffers 3
#property indicator_plots   3

//--- plot FastEMA
#property indicator_label1  "FastEMA"
#property indicator_type1   DRAW_LINE
#property indicator_color1  clrDodgerBlue
#property indicator_style1  STYLE_SOLID
#property indicator_width1  2
//--- plot SlowEMA
#property indicator_label2  "SlowEMA"
#property indicator_type2   DRAW_LINE
#property indicator_color2  clrOrangeRed
#property indicator_style2  STYLE_SOLID
#property indicator_width2  2
//--- plot SignalEMA
#property indicator_label3  "SignalEMA"
#property indicator_type3   DRAW_LINE
#property indicator_color3  clrLimeGreen
#property indicator_style3  STYLE_SOLID
#property indicator_width3  2

//--- input parameters

input int FastEMAPeriod=8; // Fast EMA period 
input int SlowEMAPeriod=16; // Slow EMA period 
input int SignalEMAPeriod=50; // Signal EMA period 

double FastEMABuffer[];
double SlowEMABuffer[];
double SignalEMABuffer[];

int handle_fast;
int handle_slow;
int handle_signal;

bool up_cross=false;
bool down_cross=false;

void OnInit()
{
    SetIndexBuffer(0,FastEMABuffer);
    SetIndexBuffer(1,SlowEMABuffer);
    SetIndexBuffer(2,SignalEMABuffer);

    handle_fast=iMA(_Symbol,_Period,FastEMAPeriod,0,MODE_EMA,PRICE_CLOSE);
    handle_slow=iMA(_Symbol,_Period,SlowEMAPeriod,0,MODE_EMA,PRICE_CLOSE);
    handle_signal=iMA(_Symbol,_Period,SignalEMAPeriod,0,MODE_EMA,PRICE_CLOSE);

}

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(BarsCalculated(handle_fast)<rates_total || BarsCalculated(handle_slow)<rates_total || BarsCalculated(handle_signal)<rates_total)
        return(prev_calculated);

    ArraySetAsSeries(FastEMABuffer,true);
    ArraySetAsSeries(SlowEMABuffer,true);
    ArraySetAsSeries(SignalEMABuffer,true);

     CopyBuffer(handle_fast,0,rates_total-1,FastEMABuffer);
     CopyBuffer(handle_slow,0,rates_total-1,SlowEMABuffer);
     CopyBuffer(handle_signal,0,rates_total-1,SignalEMABuffer);
    
    //--- loop through the bars and check for crossover conditions
    for(int i=prev_calculated-1;i<rates_total && !IsStopped();i++)
    {
        //--- reset the flags
        up_cross=false;
        down_cross=false;

        //--- check for upward crossover when above signal EMA
        if(FastEMABuffer[i]>SlowEMABuffer[i] && FastEMABuffer[i-1]<=SlowEMABuffer[i-1] && FastEMABuffer[i]>SignalEMABuffer[i])
            up_cross=true;

        //--- check for downward crossover when below signal EMA
        if(FastEMABuffer[i]<SlowEMABuffer[i] && FastEMABuffer[i-1]>=SlowEMABuffer[i-1] && FastEMABuffer[i]<SignalEMABuffer[i])
            down_cross=true;

        //--- send notification if crossover occurs
        if(up_cross)
            Alert("Upward crossover at bar ",i,". Buy signal.");
        
        if(down_cross)
            Alert("Downward crossover at bar ",i,". Sell signal.");
    }

    return(rates_total);

I'm doing a simple EMA crossover indicator. There is only one error in the project, that is on line 79,80,81

CopyBuffer(handle_fast,0,rates_total-1,FastEMABuffer);
CopyBuffer(handle_slow,0,rates_total-1,SlowEMABuffer);
CopyBuffer(handle_signal,0,rates_total-1,SignalEMABuffer);

'CopyBuffer' - no one of the overloads can be applied to the function call. Screenshot attached

[Drazen Penic]

Read the documentation.

In each place you have four (4) arguments in your code.

All three variants of the CopyBuffer expect five (5) arguments.

[Alan Walker]

Drazen Penic #:

Read the documentation.

In each place you have four (4) arguments in your code.

All three variants of the CopyBuffer expect five (5) arguments.

I'm stupid haha. I used a '-' instead of ',' when seprating `rates_total` and the count `1`. Thanks for poiting that out, I'm tired.