A blip up one minute. A slip down the next. It's a risky business. A stock's action by the minute or hour may paint a misleading picture.
Astute traders focus on daily stock charts for a clearer look at a stock's move.
The shrewdest investors go further. To get the big picture, they zoom in on weekly charts. The charts show nearly two years' worth of data. On a daily chart, you can get volatile price fluctuations as a base is formed. Weekly bars consolidate those fluctuations a little better.