One of the most difficult things to determine is a trend change, from a bull market to a bear market, and vice versa. The market needs a wall of worry to climb, and a slope of hope to decline.
Historical data shows that the prevailing climate in corrections in a bull market reach conditions that are bleak and worrisome, with the majority of investors bearish and pessimistic before the next upleg is taken.
This is what makes it so difficult to separate a trend change from a correction; sentiment is often a misleading indicator, and people will self-select soft indicators to suit their bias.
But sometimes a trend DOES change. So how can we tell the difference?
This is where technical analysis becomes an indispensable companion to the fundamental perspective. While the trend is intact it remains in control of the market, until it is broken.
"A new, invisible and at times virtual, tyranny is established, one which unilaterally and irremediably imposes its own laws and rules. Moreover, indebtedness and credit distance countries from their real economy and citizens from their real buying power. Added to this, as if it were needed, is widespread corruption and selfish fiscal evasion which have taken on worldwide dimensions. The will to power and of possession has become limitless." Francis I, 16 May 2013