//+------------------------------------------------------------------+
//|                                           AlertPriceMovement.mq4 |
//|                        Copyright 2023, MetaQuotes Software Corp. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2023, MetaQuotes Software Corp."
#property link      "https://www.mql5.com"
#property version   "1.00"
#property strict
#property indicator_chart_window
 
input int InpMovementPoints = 50;
 
double MovementValue;
 
int OnInit() {
 
    MovementValue = InpMovementPoints * SymbolInfoDouble(Symbol(), SYMBOL_POINT);
    return(INIT_SUCCEEDED);
}
 
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
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[]) {
 
    static datetime currentBarTime = 0;
    static double highTarget = 0;
    static double lowTarget = 0;
 
// Get out if bars are still loading
    if (rates_total != prev_calculated) return(rates_total);
 
    if (currentBarTime != time[0]) {
        currentBarTime = time[0];
        highTarget = open[0] + MovementValue;
        lowTarget = open[0] - MovementValue;
    }
 
    if (highTarget > 0 && close[0] >= highTarget) {
        AlertMe(highTarget, close[0], "High", TimeCurrent() - time[0]);
        highTarget = 0;
    }
 
    if (lowTarget > 0 && close[0] <= lowTarget) {
        AlertMe(lowTarget, close[0], "Low", TimeCurrent() - time[0]);
        lowTarget = 0;
    }
 
    return(rates_total);
}
 
//+------------------------------------------------------------------+
//|                                                                  |
//+------------------------------------------------------------------+
void AlertMe(double targetPrice, double currrentPrice, string type, int seconds) {
    string msg = StringFormat("Current price %f has passed %s target price of %f in %i seconds", currrentPrice, type, targetPrice, seconds);
 
    Alert(msg);
 
}
 
//+------------------------------------------------------------------+