Hi! Please my code doesnt show any data, Im new in Mql4 and I want to learn here is my code, what is wrong with it?

[karlmonfort]

//+------------------------------------------------------------------+

//|                                                     Mom Vol2.mq4 |

//|                        Copyright 2021, MetaQuotes Software Corp. |

//|                                             https://www.mql5.com |

//+------------------------------------------------------------------+

#property copyright "Copyright 2021, MetaQuotes Software Corp."

#property link      "https://www.mql5.com"

#property version   "1.00"

#property strict

#property indicator_separate_window

#property indicator_buffers 1

#property indicator_plots   1

//--- plot Label1

#property indicator_label1  "Label1"

#property indicator_type1   DRAW_LINE

#property indicator_color1  clrRed

#property indicator_style1  STYLE_SOLID

#property indicator_width1  1

//--- indicator buffers

double         Label1Buffer[];

//+------------------------------------------------------------------+

//| Custom indicator initialization function                         |

//+------------------------------------------------------------------+

int OnInit()

  {

//--- indicator buffers mapping

   SetIndexBuffer(0,Label1Buffer);

   

//---

   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[])

  {

   int i;

   double bv;

   double sv;

//---

  if(close[i] > open[i])

      {

    bv = (close[i] - open[i])*volume[i];

      }

    else

    bv = (close[i] - low[i])*volume[i];

   if(close[i] < open[i])

      {

    sv = (open[i] - close[i])*volume[i];

      }

    else

     sv = (high[i] - close[i])*volume[i]; 

//--- return value of prev_calculated for next call

   return(bv-sv);

  }

//+------------------------------------------------------------------+

[William Roeder]

1. Please edit your (original) post and use the CODE button (Alt-S)! (For large amounts of code, attach it.)
             General rules and best pratices of the Forum. - General - MQL5 programming forum (2019)
             Messages Editor

2. No question asked. No response needed. Title does not count.

3. Why do you expect to see anything, when you don't fill your buffer?

4. Learn what to return from OnCalculate
             How to do your lookbacks correctly #9 — #14 & #19