public double largestChange() {
		double highDiff = 0.0;
		
		for (int i = 1; i < this.highs.length; i ++) {
			if (Math.abs(this.highs[i] - this.highs[i - 1]) > highDiff) {
				highDiff = Math.abs(this.highs[i] - this.highs[i - 1]);
			}
		}
		
		return highDiff;
	}