There are important differences in the nature of the declines. The current series looks like a bear market in the form of 1973-4 whereas 1929-32 was much more precipitous. This may be attributed to the extraordinary actions of the FED and Treasury. However, this may only soften the blow and not the outcome, most likely adjusted for inflation.
The Intraday Volatility matches up nicely so far as we have aligned them Peak to Peak without regard to pricing. It will be in the market action going forward where the model will be assessed here.
"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