Of course, some ladders and some rungs on those ladders are better than others. But when a stock forms a base, it's firming up, becoming more solid, becoming less volatile. This behavior give the stock the chance to move higher. This is somewhat like moving up a ladder; it's only possible when the rungs are firm and constant.
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Please review the linked page for context.
If you can think of something better than this,
please add it to the database