Usually, you might want to specify the number of event occurrences from that topic required to activate a rule.

If you specify an event count for the topic, the rule activates when the specified number of events meet the rule condition. For example, the following rule activates when any one stock event has a price property that is greater than $10:

If 100 stock events occur with a stock price greater than $10, the rule activates 100 times.

The following rule activates when five stock events have a price greater than $10:

If you do not specify the number of event occurrences required to activate a rule, the rule activates for all events that meet the condition.

In the following example, the one news event must contain all of the symbols for every stock event that occurs:

You can specify the number of occurrences for the stock event. The following rule activates when the headline property of one News event contains the same stock symbol found in one stock event.

Consider that you want to see whether the total amount of transactions for the day exceeds $10,000. You do not require to specify the number of events that meet the rule condition, because you want to evaluate all of the transaction events that occur that day. The following rule activates when the sum of all of the transactions for the day exceeds 10,000: