I see why you would say that, but let me explain in more detail. The large downward push doesn't occur on a low volume day, but usually follows many low volume days. The downward plunge is usually itself relatively high volume day, but doesn't always have to be. The AH form T trades themselves are always in proportion to the days volume, though.
When the price is leveling out, the bollies tightening signaling a move and the volume has been low showing no interest they pounce and push everything down. It has happened many many times like clock work.
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