Hellow Guys I'm trying to set my Indicator but i'm fail

[stonegoldtz]

//+------------------------------------------------------------------+
//| RSI.mq5 |
//| Copyright 2000-2025, MetaQuotes Ltd. |
//| https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2000-2025, MetaQuotes Ltd."
#property link "https://www.mql5.com"
#property description "Relative Strength Index"
//--- indicator settings
#property indicator_separate_window
#property indicator_minimum 0
#property indicator_maximum 100
#property indicator_level1 30
#property indicator_level2 70
#property indicator_buffers 3
#property indicator_plots 1
#property indicator_type1 DRAW_LINE
#property indicator_color1 DodgerBlue
//--- input parameters
input int InpPeriodRSI=14; // Period
//--- indicator buffers
double ExtRSIBuffer[];
double ExtPosBuffer[];
double ExtNegBuffer[];

int ExtPeriodRSI;
//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
void OnInit()
{
//--- check for input
if(InpPeriodRSI<1)
{
ExtPeriodRSI=14;
PrintFormat("Incorrect value for input variable InpPeriodRSI = %d. Indicator will use value %d for calculations.",
InpPeriodRSI,ExtPeriodRSI);
}
else
ExtPeriodRSI=InpPeriodRSI;
//--- indicator buffers mapping
SetIndexBuffer(0,ExtRSIBuffer,INDICATOR_DATA);
SetIndexBuffer(1,ExtPosBuffer,INDICATOR_CALCULATIONS);
SetIndexBuffer(2,ExtNegBuffer,INDICATOR_CALCULATIONS);
//--- set accuracy
IndicatorSetInteger(INDICATOR_DIGITS,2);
//--- sets first bar from what index will be drawn
PlotIndexSetInteger(0,PLOT_DRAW_BEGIN,ExtPeriodRSI);
//--- name for DataWindow and indicator subwindow label
IndicatorSetString(INDICATOR_SHORTNAME,"RSI("+string(ExtPeriodRSI)+")");
}
//+------------------------------------------------------------------+
//| Relative Strength Index |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
const int prev_calculated,
const int begin,
const double &price[])
{
if(rates_total<=ExtPeriodRSI)
return(0);
//--- preliminary calculations
int pos=prev_calculated-1;
if(pos<=ExtPeriodRSI)
{
double sum_pos=0.0;
double sum_neg=0.0;
//--- first RSIPeriod values of the indicator are not calculated
ExtRSIBuffer[0]=0.0;
ExtPosBuffer[0]=0.0;
ExtNegBuffer[0]=0.0;
for(int i=1; i<=ExtPeriodRSI; i++)
{
ExtRSIBuffer[i]=0.0;
ExtPosBuffer[i]=0.0;
ExtNegBuffer[i]=0.0;
double diff=price[i]-price[i-1];
sum_pos+=(diff>0?diff:0);
sum_neg+=(diff<0?-diff:0);
}
//--- calculate first visible value
ExtPosBuffer[ExtPeriodRSI]=sum_pos/ExtPeriodRSI;
ExtNegBuffer[ExtPeriodRSI]=sum_neg/ExtPeriodRSI;
if(ExtNegBuffer[ExtPeriodRSI]!=0.0)
ExtRSIBuffer[ExtPeriodRSI]=100.0-(100.0/(1.0+ExtPosBuffer[ExtPeriodRSI]/ExtNegBuffer[ExtPeriodRSI]));
else
{
if(ExtPosBuffer[ExtPeriodRSI]!=0.0)
ExtRSIBuffer[ExtPeriodRSI]=100.0;
else
ExtRSIBuffer[ExtPeriodRSI]=50.0;
}
//--- prepare the position value for main calculation
pos=ExtPeriodRSI+1;
}
//--- the main loop of calculations
for(int i=pos; i<rates_total && !IsStopped(); i++)
{
double diff=price[i]-price[i-1];
ExtPosBuffer[i]=(ExtPosBuffer[i-1](ExtPeriodRSI-1)+(diff>0.0?diff:0.0))/ExtPeriodRSI;
ExtNegBuffer[i]=(ExtNegBuffer[i-1](ExtPeriodRSI-1)+(diff<0.0?-diff:0.0))/ExtPeriodRSI;
if(ExtNegBuffer[i]!=0.0)
ExtRSIBuffer[i]=100.0-100.0/(1+ExtPosBuffer[i]/ExtNegBuffer[i]);
else
{
if(ExtPosBuffer[i]!=0.0)
ExtRSIBuffer[i]=100.0;
else
ExtRSIBuffer[i]=50.0;
}
}
//--- OnCalculate done. Return new prev_calculated.
return(rates_total);
}
//+------------------------------------------------------------------+

[sktsec]

What does the indicator suppose to do ?

[l'andorrà]

fxDreema cannot be used to create indocators, but EAs. The best you can do here is creating an EA doing thet, but not a proper indicator.