FX-Acceleration.mq4

//+------------------------------------------------------------------+
//|                                                 Acceleration.mq4 |
//|                        Copyright 2017, MetaQuotes Software Corp. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2017, MetaQuotes Software Corp."
#property link      "https://www.mql5.com"
#property version   "1.00"
#property strict

double previousPrice;
bool isFirstEvent = true;
string lastAlert = "---";
double lastDiff = 0;
int try = 0;
double spread = 0;
double pips = 0;
double difference = 0;

input int timer = 1000;
input int targetSpeed = 10;
input int targetSpeedLvl2 = 20;
input int targetSpeedLvl3 = 30;

int OnInit() {
   EventSetMillisecondTimer(timer);
   return(INIT_SUCCEEDED);
}

void OnDeinit(const int reason) {
   EventKillTimer();      
}

void OnTick(){
  spread = MathRound((Ask - Bid) / Point);
  displayComments();
}

void OnTimer(){

  if (isFirstEvent) {
    isFirstEvent = false;
    previousPrice = Close[0];
    return;
  }
  
  try += 1;
  
  difference = Close[0] - previousPrice;
  pips = MathRound(difference / Point);
  spread = MathRound((Ask - Bid) / Point);

  displayComments();
  
  if (try >= 30) {
    lastAlert = "---";
    lastDiff = 0;
  }
  
  if (MathAbs(pips) >= targetSpeed) {
    try = 0;
    PlaySound("alert.wav");
    
    if (MathAbs(pips) >= targetSpeedLvl2)
      PlaySound("alert.wav");
    
    if (MathAbs(pips) >= targetSpeedLvl3)
      PlaySound("alert.wav");
    
    if (pips > 0) {
      lastAlert = "BUY";
      lastDiff = pips;
    }
    
    if (pips < 0) {
      lastAlert = "SELL";
      lastDiff = pips;
    }
  }

  previousPrice = Close[0];
}

void displayComments() {
  Comment(
    "Diff:  ", pips,
    " | Last:  ", lastAlert, "   ", lastDiff,
    " | Spread:  ", spread
  );
}