Re: [rules-users] Finding Average using sliding window

I've read through the fusion document...But am clueless on getting average over a fixed time window... In the stocktick sample, using sliding window I could get average for every event happening. But I would like to get the average for a fixed time window. For example, if I would like to know the average stockprice of 'RHAT' for every fixed window of 30s, how this can be achieved in drools fusion?