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//+------------------------------------------------------------------+
//| Gold_Liquidity_Sweep.mq4|
//| Copyright 2023, Your Forum Name|
//| Specialized for XAU/USD |
//+------------------------------------------------------------------+
#property copyright "YourForumName"
#property link "http://yourforumlink.com"
#property version "1.00"
#property strict

#property indicator_chart_window
#property indicator_buffers 2
#property indicator_plots 2

// Plot Settings
#property indicator_type1 DRAW_ARROW
#property indicator_color1 clrLime
#property indicator_width1 2
#property indicator_label1 "Buy Sweep (Bullish)"

#property indicator_type2 DRAW_ARROW
#property indicator_color2 clrRed
#property indicator_width2 2
#property indicator_label2 "Sell Sweep (Bearish)"

//--- Inputs
input int EMA_Period = 20; // Filter EMA Period
input bool Alert_Enabled = true; // Enable Sound/Popup Alerts
input int LookbackDays = 1; // Look back days to find High/Low

//--- Buffers
double BuyBuffer[];
double SellBuffer[];

// Global Variables
double pdh, pdl; // Previous Day High and Low

//+------------------------------------------------------------------+
//| Custom indicator initialization function |
//+------------------------------------------------------------------+
int OnInit()
{
SetIndexBuffer(0, BuyBuffer);
SetIndexArrow(0, 233); // Up Arrow

SetIndexBuffer(1, SellBuffer);
SetIndexArrow(1, 234); // Down Arrow

// Set up levels on chart (optional visual)
ObjectCreate(0, "PDH_Line", OBJ_HLINE, 0, 0, 0);
ObjectSetInteger(0, "PDH_Line", OBJPROP_COLOR, clrGray);
ObjectSetInteger(0, "PDH_Line", OBJPROP_STYLE, STYLE_DOT);

ObjectCreate(0, "PDL_Line", OBJ_HLINE, 0, 0, 0);
ObjectSetInteger(0, "PDL_Line", OBJPROP_COLOR, clrGray);
ObjectSetInteger(0, "PDL_Line", OBJPROP_STYLE, STYLE_DOT);

return(INIT_SUCCEEDED);
}

//+------------------------------------------------------------------+
//| Custom indicator iteration |
//+------------------------------------------------------------------+
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 limit = rates_total - prev_calculated;
if(limit > 1) limit = rates_total - 1;

// Update Previous Day High/Low automatically
pdh = iHigh(Symbol(), PERIOD_D1, 0); // Current day high (changes as it happens) or previous.
// To be precise for "Yesterday", we use index 1:
pdh = iHigh(_Symbol, PERIOD_D1, 1);
pdl = iLow(_Symbol, PERIOD_D1, 1);

// Update Hlines on chart visually
ObjectMove(0, "PDH_Line", 0, 0, pdh);
ObjectMove(0, "PDL_Line", 0, 0, pdl);

for(int i = limit; i >= 0; i--)
{
BuyBuffer = 0;
SellBuffer = 0;

double currentEMA = iMA(_Symbol, 0, EMA_Period, 0, MODE_EMA, PRICE_CLOSE, i);

//--- BULLISH LIQUIDITY SWEEP ---
// Logic: Price dipped below yesterday's low (Liquidity Grab)
// but closed above it or higher than the previous candle.
if(low < pdl && close > pdl && close > close[i+1])
{
if(close > currentEMA) // Confirmation of momentum
{
BuyBuffer = low - (20 * _Point);
if(i == 0 && prev_calculated != 0) TriggerAlert("BULLISH SWEEP: XAU/USD");
}
}

//--- BEARISH LIQUIDITY SWEEP ---
// Logic: Price spiked above yesterday's high (Liquidity Grab)
// but closed below it.
if(high > pdh && close < pdh && close[i] < close[i+1])
{
if(close[i] < currentEMA) // Confirmation of momentum
{
SellBuffer[i] = high[i] + (20 * _Point);
if(i == 0 && prev_calculated != 0) TriggerAlert("BEARISH SWEEP: XAU/USD");
}
}
}

return(rates_total);
}

//+------------------------------------------------------------------+
//| Alert System |
//+------------------------------------------------------------------+
void TriggerAlert(string msg)
{
static datetime lastAlert = 0;
if(Time[0] != lastAlert)
{
Alert(msg);
SendNotification(msg); // Sends to mobile if configured in MT4 options
lastAlert = Time[0];
}
}