Expanding on Firewalkers suggestion, try 2-minute bar charts for DOW cash and DAX future - excellent correlation. Also use a simple moving average (30 period) on each for general support and resistance, and as a good short-term trend indicator.
98% of the time, the DAX lags by a few seconds. However, beware of whip-saw - minor fluctuations on the DOW can be magnified on DAX. One idea may be to also monitor the DJ Euro Stoxx future at the same time to see whether trading direction is more broadly supported.
See attached file.
As an aside: almost 2 million (1,995,752) Stoxx futures traded Friday; 313,497 DAX futures.
Grant.