class Stock
	Name
	InitializeValue (stockPrice)
	maxChange (stockPriceChange)
	threshold (the value nearest to measure the change of te stock for raising an event.)
	Stock (name/startingValue, maxChange, threshold) {
		currentValue = startingValue;
		notification Threshold = threshold;
		thread = new Thread (new ThreadStart(Activate));

public void Activate() {
	for(;;){
		Thread.sleep(500);
		ChangeStockValue();
	}
}

ChangeStockValue() {
	currentValue += random between 1 and maxChange
	numberChanges++;
		if(currentValue - initialValue) > notificationThreshold {
			Raise the event
				create event data(e);
				OnStockChangeReached(e);
		}
}

class Broker {
	brokerName
	List<Stock>stocks;
	
	addStock(Stock s) {
		add a stock to the list
		s.notification += BrokerEventHandler (send stock info to he console window)
		s.notification += FileEventHandler(toFile)