MQL5 Printf, PrintFormat & Comment: Logging & Chart Displays

//+------------------------------------------------------------------+
//|                                  PrintfPrintFormatCommentGuide.mq5|
//|                             Copyright 2026, Pineify Guides Series |
//|                                              https://pineify.app |
//+------------------------------------------------------------------+
#property copyright "Pineify Guides Series"
#property link      "https://pineify.app/mql5/printf-printformat-comment-guide"
#property version   "1.00"
#property strict

//--- Input parameters
input double InpRiskPercent  = 1.5;        // Risk Per Trade (%)
input ulong  InpMagicNumber  = 884400;     // Expert Magic Number
input bool   InpVerboseLog   = true;       // Enable Detailed Logging

//--- State tracking
ulong g_tickCounter = 0;

//+------------------------------------------------------------------+
//| Expert initialization function                                   |
//+------------------------------------------------------------------+
int OnInit()
  {
   // printf() and PrintFormat() are identical in MQL5
   printf("=== Pineify EA Initialized: %s ===", _Symbol);
   PrintFormat("Settings -> Risk: %.1f%% | Magic: %I64u | Digits: %d | Point: %.5f",
               InpRiskPercent, InpMagicNumber, _Digits, _Point);

   return(INIT_SUCCEEDED);
  }

//+------------------------------------------------------------------+
//| Expert deinitialization function                                 |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
  {
   // Clear on-chart HUD comment
   Comment("");

   PrintFormat("EA removed from %s. Cleared HUD. Reason code: %d", _Symbol, reason);
  }

//+------------------------------------------------------------------+
//| Expert tick function                                             |
//+------------------------------------------------------------------+
void OnTick()
  {
   g_tickCounter++;

   // Gather real-time account and market metrics
   double ask       = SymbolInfoDouble(_Symbol, SYMBOL_ASK);
   double bid       = SymbolInfoDouble(_Symbol, SYMBOL_BID);
   int    spread    = (int)SymbolInfoInteger(_Symbol, SYMBOL_SPREAD);
   double balance   = AccountInfoDouble(ACCOUNT_BALANCE);
   double equity    = AccountInfoDouble(ACCOUNT_EQUITY);
   double profit    = AccountInfoDouble(ACCOUNT_PROFIT);

   // Build multi-line on-chart dashboard via StringFormat
   string hudText = StringFormat(
      "------------------------------------------\n" +
      " PINEIFY DASHBOARD: %s\n" +
      "------------------------------------------\n" +
      " Ask: %.*f | Bid: %.*f | Spread: %d pts\n" +
      " Balance: $%.2f | Equity: $%.2f\n" +
      " Floating PnL: $%.2f\n" +
      " Processed Ticks: %I64u\n" +
      " Server Time: %s\n" +
      "------------------------------------------",
      _Symbol,
      _Digits, ask, _Digits, bid, spread,
      balance, equity,
      profit,
      g_tickCounter,
      TimeToString(TimeCurrent(), TIME_DATE|TIME_SECONDS)
   );

   // Update chart display
   Comment(hudText);

   // Output formatted log on every 100th tick if verbose mode enabled
   if(InpVerboseLog && (g_tickCounter % 100 == 0))
     {
      PrintFormat("[Tick #%I64u] %s Spread: %d pts | Floating: $%.2f",
                  g_tickCounter, _Symbol, spread, profit);
     }
  }