Неще да работи гнидата каквото и да човъркам.. някои има ли идея как да го фикснеме? ^^

using System;

class PriceChangeAlert
{
    static void Main(string[] args)
    {
        //Entry variables
        int n = int.Parse(Console.ReadLine());
        double granica = double. Parse(Console.ReadLine());
        double lastPrice = double.Parse(Console.ReadLine());

        //Prices and Price Difference
        for (int i = 0; i < n - 1; i++)
        {
            double currentPrice = double.Parse(Console.ReadLine());
            double div = Proxy(lastPrice, currentPrice);
            bool isSignificantDifference = IsDifferentCheck(div, granica);

            string message = GetPercentageDifference(currentPrice, lastPrice, div, isSignificantDifference);
            Console.WriteLine(message);

            lastPrice = currentPrice;
        }
    }

    //Difference Check
    static bool IsDifferentCheck(double granica, double IsDifferentCheck)
    {
        if (Math.Abs(granica) >= IsDifferentCheck)
        {
            return true;
        }
        return false;
    }

    //Difference Percentage
    static string GetPercentageDifference(double currentPrice, double lastPrice, double difference, bool eitherTrueOrFalse)
    {
        string priceChange = "";

        if (difference == 0)
        {
            priceChange = string.Format("NO CHANGE: {0}", currentPrice);
        }

        else if (!eitherTrueOrFalse)
        {
            priceChange = string.Format("MINOR CHANGE: {0} to {1} ({2:F2}%)", lastPrice, currentPrice, difference);
        }

        else if (eitherTrueOrFalse && (difference > 0))
        {
            priceChange = string.Format("PRICE UP: {0} to {1} ({2:F2}%)", lastPrice, currentPrice, difference);
        }

        else if (eitherTrueOrFalse && (difference < 0))
        {
            priceChange = string.Format("PRICE DOWN: {0} to {1} ({2:F2}%)", lastPrice, currentPrice, difference);
        }

        return priceChange;
    }

    //Dont know what the fuck this is lol
    static double Proxy(double lastPrice, double currentPrice)
    {
         double result = currentPrice - lastPrice;
         return result;
    }
}