public static boolean isAlwaysIncreasingOrDecreasing(int[] sequence) {
        //check if decreasing
        int previous = arr[0];
        boolean decreasing = true;
        for(int i = 1; i < arr.length; i++) {
            if(previous < arr[i]) {
                decreasing = false;
                break;
            }
            previous = arr[i];
        }

        //check if increasing
        int previous = arr[0];
        boolean increasing = true;
        for(int i = 1; i < arr.length; i++) {
            if(previous > arr[i]) {
                increasing = false;
                break;
            }
            previous = arr[i];
        }

        //return true if always increasing or decreasing
        if(decreasing || increasing) {
            return false;
        }

        return true;
}