//+------------------------------------------------------------------+
//|                                     Previous Week High & Low.mq5 |
//|                                        © 2025 SYLVESTER AKLAMAVO |
//|                                             syssyforex@gmail.com |
//+------------------------------------------------------------------+
#property copyright "SYLVESTER AKLAMAVO"
#property link      "syssyforex@gmail.com"
#property version   "1.00"


#property indicator_chart_window
#property indicator_buffers 0
#property indicator_plots   0
#property strict

// === Editable Inputs ===
input color   HighLineColor = clrRed;
input color   LowLineColor  = clrLime;
input int     LineWidth     = 2;
input ENUM_LINE_STYLE LineStyle = STYLE_DASHDOTDOT;

// === Object Names ===
#define HIGH_LINE_NAME "PrevWeekHighLine"
#define LOW_LINE_NAME  "PrevWeekLowLine"

//+------------------------------------------------------------------+
//| Initialization                                                   |
//+------------------------------------------------------------------+
int OnInit()
  {
   EventSetTimer(60);  // Check every 60 seconds
   DrawPrevWeekLines();
   return(INIT_SUCCEEDED);
  }

//+------------------------------------------------------------------+
//| Deinitialization                                                 |
//+------------------------------------------------------------------+
void OnDeinit(const int reason)
  {
   EventKillTimer();
   ObjectDelete(0, HIGH_LINE_NAME);
   ObjectDelete(0, LOW_LINE_NAME);
  }

//+------------------------------------------------------------------+
//| Timer Event                                                      |
//+------------------------------------------------------------------+
void OnTimer()
  {
   DrawPrevWeekLines();
  }

//+------------------------------------------------------------------+
//| Main drawing logic                                               |
//+------------------------------------------------------------------+
void DrawPrevWeekLines()
  {
   double highs[1], lows[1];
   datetime prevWeekTime[1], currWeekTime[1];

   if (CopyHigh(_Symbol, PERIOD_W1, 1, 1, highs) <= 0 ||
       CopyLow(_Symbol, PERIOD_W1, 1, 1, lows) <= 0 ||
       CopyTime(_Symbol, PERIOD_W1, 1, 1, prevWeekTime) <= 0 ||
       CopyTime(_Symbol, PERIOD_W1, 0, 1, currWeekTime) <= 0)
     {
      Print("❌ Failed to retrieve weekly candle data.");
      return;
     }

   double prev_high = highs[0];
   double prev_low  = lows[0];

   datetime curr_week_start = currWeekTime[0];
   datetime curr_week_end   = curr_week_start + 7 * 24 * 60 * 60;

   DrawHorizontalSegment(HIGH_LINE_NAME, curr_week_start, curr_week_end, prev_high, HighLineColor);
   DrawHorizontalSegment(LOW_LINE_NAME, curr_week_start, curr_week_end, prev_low,  LowLineColor);
  }

//+------------------------------------------------------------------+
//| Draw horizontal line segment                                     |
//+------------------------------------------------------------------+
void DrawHorizontalSegment(string name, datetime time1, datetime time2, double price, color clr)
  {
   ObjectDelete(0, name); // Remove existing object

   if (!ObjectCreate(0, name, OBJ_TREND, 0, time1, price, time2, price))
     {
      Print("❌ Failed to create line: ", name);
      return;
     }

   ObjectSetInteger(0, name, OBJPROP_COLOR, clr);
   ObjectSetInteger(0, name, OBJPROP_WIDTH, LineWidth);
   ObjectSetInteger(0, name, OBJPROP_STYLE, LineStyle);
   ObjectSetInteger(0, name, OBJPROP_RAY_RIGHT, false);
   ObjectSetInteger(0, name, OBJPROP_RAY_LEFT, false);
   ObjectSetInteger(0, name, OBJPROP_BACK, true);
   ObjectSetInteger(0, name, OBJPROP_SELECTABLE, false);
  }

//+------------------------------------------------------------------+
//| Required dummy calculation for indicators                        |
//+------------------------------------------------------------------+
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[])
  {
   return(rates_total);
  }