Need help understand how to clean codes in mql

Hi.

I have background in Java and C but I was never good at cleaning codes and I want to be a junior software engineer even though I am 43. Anyone is kind enough to help me clean the code or I am better of at stackoverflow?

Regards
David.
This is a script on buying whole number or half number for currency pairs that have 3 decimals, 5 decimals or 2 decimals.

It is based off wicksdon'tlie momentum strategy only for breakout that follow one of Einstein laws of inertia.

//+------------------------------------------------------------------+
//| BuyStop105.mq4 |
//| Copyright 2021, MetaQuotes Software Corp. |
//| https://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2021, MetaQuotes Software Corp."
#property link "https://www.mql5.com"
#property version "1.00"
#property strict
double newopen;
double _50Pips;
double buffer_entry;
double buffer_exit;
// We define the basic data.
double StopLoss=50; // Stop-Loss in pips 3 digits because of decimals
double TakeProfit=130; // Take-Profit in pips. 3 digits because decimals.
double LotSize=0.01; // Lot size in lots
double Slippage=5; // Slippage in pips
double Command=OP_BUYSTOP; // Type of order, BUY
int MagicNumber=16384;
double CalculateNormalizedDigits()
{
if(Digits<=3){
return(0.01);
}
else if(Digits>=4){
return(0.0001);
}
else return(0);
}
//+------------------------------------------------------------------+
//| Script program start function |
//+------------------------------------------------------------------+
void OnStart()
{
//---
// for currency pairs that has 3 decimals place
if (Digits ==2)
{
//--- this formula round of to decimal place. 1000 = 0.001 while 100 = 0.01 and 10 = 0.1
newopen = MathRound(High[0] * 1) /1;
_50Pips = newopen - 0.0005;

if (High[0] > newopen)
{
Alert("High is " + High[0] + " Entry price should be " + (newopen+0.5) + " SL is " + newopen);
buffer_entry = newopen+0.5;
buffer_exit = newopen;
}

if (High[0] <= newopen)
{
Alert("High is " + High[0] + " Entry price should be " + newopen + " SL is " + _50Pips);
buffer_entry = newopen;
buffer_exit = _50Pips;
}
}
// for currency pairs that has 5 decimals place
if (Digits ==5)
{
//--- this formula round of to decimal place. 1000 = 0.001 while 100 = 0.01 and 10 = 0.1
newopen = MathRound(High[0] * 1000) /1000;
_50Pips = newopen - 0.0005;

if (High[0] > newopen)
{
Alert("High is " + High[0] + " Entry price should be " + (newopen+0.0005) + " SL is " + newopen);
buffer_entry = newopen+0.0005;
buffer_exit = newopen;
}

if (High[0] <= newopen)
{
Alert("High is " + High[0] + " Entry price should be " + newopen + " SL is " + _50Pips);
buffer_entry = newopen;
buffer_exit = _50Pips;
}
}

// for currency pairs that has 3 decimals place
if (Digits == 3)
{

//--- this formula round of to decimal place. 1000 = 0.001 while 100 = 0.01 and 10 = 0.1
newopen = MathRound(High[0] * 10) /10;
_50Pips = newopen - 0.05;


if (High[0] > newopen)
{
Alert("High is " + High[0] + " Entry price should be " + (newopen+0.05) + " SL is " + newopen);
buffer_entry = newopen+0.05;
buffer_exit = newopen;
}

if (High[0] <= newopen)
{
Alert("High is " + High[0] + " Entry price should be " + newopen + " SL is " + _50Pips);
buffer_entry = newopen;
buffer_exit = _50Pips;
}
}



//--- get minimum stop level
double minstoplevel=MarketInfo(Symbol(),MODE_STOPLEVEL);
Print("Minimum Stop Level=",minstoplevel," points");
double price=buffer_entry;

//--- calculated SL and TP prices
double stoploss=buffer_entry - StopLoss*Point;
double takeprofit=buffer_entry + TakeProfit*Point;
//--- place market order to buy 1 lot
int ticket=OrderSend(Symbol(),OP_BUYSTOP,LotSize,buffer_entry,Slippage,stoploss,takeprofit,"My order",MagicNumber,0,clrGreen);
if(ticket<0)
{
Print("OrderSend failed with error #",GetLastError());
}
else
Print("OrderSend placed successfully");
//---

}
//+------------------------------------------------------------------+

What do you mean? To me, 'to clean (up) a code' means removing unnecessary parts. I do not see such code in what you provided. BTW, when you post code, use the appropriate bbcode tags (or the source button in the editor), and not dump it as text..