tsAggr = createTimeSeriesAggregator(name="tsAggr", windowSize=300000, step=300000, metrics=<[first(lastprice),max(lastprice),min(lastprice),last(lastprice),sum(volume)]>, dummyTable=typesTable, outputTable=OHLC, timeColumn=`timestamp, keyColumn=`symbol, updateTime=10, useWindowStartTime=true)