Day traders' weekend lounge December 1 - 3, page-35

Yes on the one hour chart, it is all about whether price is making higher highs and higher lows in an uptrend or whether price is making lower lows and lower highs in a downtrend.
In an uptrend, lows should hold and the highs should break easily to allow higher highs to be created. Once lows start breaking and lower lows are being created then that is no longer the definition of the behaviour of price expected in an uptrend and it is at that point that the new downtrend is confirmed.