If the random variability in a time series is great and exponential smoothing is being used to forecast, then a high alpha ($\alpha$) value should be used.

Name: If the random variability in a time series is great and exponential smoothing is being used to forecast, then a high alpha ($\alpha$) value should be used.
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When the random variability in a time series is great, a low alpha ($\alpha$) value should be used in exponential smoothing to reduce the impact of recent observations on the forecast.

If the Random Variability in a Time Series Is Great α\alphaα

If the Random Variability in a Time Series Is Great $\alpha$