var fs = require('fs');

fs.readFile('textfile.txt','utf8', (err, data) =>
{
  if (err) throw err;
  var TempArray = data.split("\r\n")
  var LineCounter = 0;
  var IncreaseCounter = 0;
  var LastIncrease = 0;
  var Invested = false;

  //Count through values in the textfile
  for(var i = 0;i < TempArray.length;i++)
  {
  	LineCounter++;
  		if(TempArray[i] > TempArray[i-1] && !Invested)
  		{
  			if(IncreaseCounter > 0 && LastIncrease == LineCounter - 1)+
  			{
  				IncreaseCounter++
  			}
  			else if(IncreaseCounter == 0)
  			{
  				IncreaseCounter++
  			}
  			else
  			{
  				IncreaseCounter == 0;
  			}
  			LastIncrease = LineCounter;
  			if(IncreaseCounter == 3)
  			{
  				console.log("Purchase ducats on line ", LineCounter)
  				Invested = true;
  				IncreaseCounter = 0;
  			}
  		}
  		if(Invested)
  		{
  			if(TempArray[i] < TempArray[i-1])
  			{
  				console.log("Sell ducats on line ", LineCounter);
  				Invested = false;
  			}
  		}
  	}
})