how to detect a trend what time period is equal to Series 2 how to find significant change in a trend when do two time series change over time? what is the relationship between series 1 and series 2 when are the two time series the same what is the trend for the time period for series 1 when do trends change in time period what is the difference between series two and seven what is the difference between a series one and two time periods when a trend is detected in a time series how do you find whether a trend is changing when trend changes over time, how is it determined? if there is a trend change in both series at the same time period what is the difference between a series and a time period what is series 1 at timeperiod 50? when two time periods are identical how long are they does trend increase and decrease with time what is the difference between series1 & series2 how do you measure a trend