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.
"The more power a government has the more it can act arbitrarily according to the whims and desires of the elite, and the more it will make war on others and murder its foreign and domestic subjects. Power will achieve its murderous potential. It simply waits for an excuse, an event of some sort, an assassination, a massacre in a neighboring country, an attempted coup, a famine, or a natural disaster, to justify the beginning of murder en masse."
R. J. Rummel, Mass Murder and Genocide, 1994