I have been reading Ord's comments for about a year, and I've found his volume analysis has been quite accurate. You can pretty much break it down to this:
If a major level is tested or slightly breached, and volume increases by 8% or so, price should eventually seek support/resistance beyond that level that was breached.
Similarly, if a level is tested or slightly breached, and volume shrinks by 8% or so, price should reverse and test the previous level that repelled price.
It's really fairly simple, but also fairly effective.
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