Hi Skilled Pete,
I wouldn't be too fussed with strength & weakness on the 5m until you're satisfied with overall movement on the daily/hourly. Strength/Weakness on the 5m can be anything from intra-day levels, profit taking, running higher timeframe stops, news, market opens etc.. if you trade inline with the daily/hourly, you'll atleast be in the right overall direction.
The 5m tf is extremely handy for noting the climactic volume we're looking for (but we've already determined from the higher time frame both in what direction we're looking and where we want to se ethe volume).
My two cents but fairly inline with Pete's o/all method.