【MQL4】増し玉(ピラミッディング)の現在の段階と次のラインを表示する確認専用インジケーターの作り方

//+------------------------------------------------------------------+
//|                                   PyramidingLevelIndicator.mq4   |
//|                     Copyright 2026, FX-EA System Project Creator |
//|                        https://creator.fx-ea-system-project.com/ |
//+------------------------------------------------------------------+
#property copyright "Copyright 2026, FX-EA System Project Creator"
#property link      "https://creator.fx-ea-system-project.com/"
#property version   "1.00"
#property strict
#property indicator_chart_window
#property indicator_buffers 0

#define LABEL_NAME "PyramidingLevelPanel"
#define LINE_NAME  "PyramidingNextLine"

input double InpLots                = 0.01;  //1段あたりの想定ロット数
input int    InpStepPoints          = 150;   //増し玉を判定する価格の刻み幅(ポイント)
input int    InpMaxLevels           = 4;     //最大の増し玉段階数
input double InpMinMarginLevelToAdd = 300.0; //増し玉を安全と判断する維持率(%)の基準
input int    InpMagicNumber         = 20261029;

int CountMyOrders()
  {
   int count = 0;
   for(int i = 0; i < OrdersTotal(); i++)
     {
      if(OrderSelect(i, SELECT_BY_POS, MODE_TRADES))
        {
         if(OrderSymbol() == _Symbol && OrderMagicNumber() == InpMagicNumber)
            count++;
        }
     }
   return(count);
  }

double GetLatestOpenPrice()
  {
   datetime latest = 0;
   double   price  = 0;

   for(int i = 0; i < OrdersTotal(); i++)
     {
      if(OrderSelect(i, SELECT_BY_POS, MODE_TRADES))
        {
         if(OrderSymbol() == _Symbol && OrderMagicNumber() == InpMagicNumber)
           {
            if(OrderOpenTime() > latest)
              {
               latest = OrderOpenTime();
               price  = OrderOpenPrice();
              }
           }
        }
     }
   return(price);
  }

void UpdatePanel()
  {
   int level = CountMyOrders();

   if(level == 0)
     {
      ObjectSetText(LABEL_NAME, "増し玉段階: 0 (未保有、次は1段目の新規発注)", 11, "Arial", clrSilver);
      ObjectDelete(0, LINE_NAME);
      return;
     }

   double lastPrice = GetLatestOpenPrice();
   double nextLine   = lastPrice + InpStepPoints * Point;

   double marginPerLot    = MarketInfo(_Symbol, MODE_MARGINREQUIRED);
   double estimatedMargin = AccountMargin() + marginPerLot * InpLots;
   double estimatedLevel  = (estimatedMargin > 0) ? AccountEquity() / estimatedMargin * 100 : 0;
   bool   safeToAdd        = (estimatedLevel >= InpMinMarginLevelToAdd);

   color textColor = safeToAdd ? clrLime : clrOrange;
   if(level >= InpMaxLevels)
      textColor = clrRed;

   string text;
   if(level >= InpMaxLevels)
      text = StringFormat("増し玉段階: %d/%d (最大段階に到達、これ以上は増やさない想定)", level, InpMaxLevels);
   else
      text = StringFormat("増し玉段階: %d/%d  次のライン:%s  増やした場合の見積り維持率:%.0f%%(基準%.0f%%)",
                           level, InpMaxLevels, DoubleToString(nextLine, Digits), estimatedLevel, InpMinMarginLevelToAdd);

   ObjectSetText(LABEL_NAME, text, 11, "Arial", textColor);

   if(level < InpMaxLevels)
     {
      if(ObjectFind(LINE_NAME) < 0)
         ObjectCreate(0, LINE_NAME, OBJ_HLINE, 0, 0, nextLine);
      else
         ObjectSetDouble(0, LINE_NAME, OBJPROP_PRICE, nextLine);
      ObjectSetInteger(0, LINE_NAME, OBJPROP_COLOR, textColor);
      ObjectSetInteger(0, LINE_NAME, OBJPROP_STYLE, STYLE_DASH);
     }
   else
      ObjectDelete(0, LINE_NAME);
  }

int OnInit()
  {
   ObjectCreate(0, LABEL_NAME, OBJ_LABEL, 0, 0, 0);
   ObjectSetInteger(0, LABEL_NAME, OBJPROP_CORNER, CORNER_LEFT_UPPER);
   ObjectSetInteger(0, LABEL_NAME, OBJPROP_XDISTANCE, 10);
   ObjectSetInteger(0, LABEL_NAME, OBJPROP_YDISTANCE, 20);
   EventSetTimer(1);
   UpdatePanel();
   return(INIT_SUCCEEDED);
  }

void OnDeinit(const int reason)
  {
   EventKillTimer();
   ObjectDelete(0, LABEL_NAME);
   ObjectDelete(0, LINE_NAME);
  }

void OnTimer()
  {
   UpdatePanel();
  }

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[])
  {
   UpdatePanel();
   return(rates_total);
  }