  We propose a multivariate elastic net regression forecast model for German
quarter-hourly electricity spot markets. While the literature is diverse on
day-ahead prediction approaches, both the intraday continuous and intraday
call-auction prices have not been studied intensively with a clear focus on
predictive power. Besides electricity price forecasting, we check for the
impact of early day-ahead (DA) EXAA prices on intraday forecasts. Another
novelty of this paper is the complementary discussion of economic benefits. A
precise estimation is worthless if it cannot be utilized. We elaborate possible
trading decisions based upon our forecasting scheme and analyze their monetary
effects. We find that even simple electricity trading strategies can lead to
substantial economic impact if combined with a decent forecasting technique.
