>>15427081
your pic related is correct. It's unusual to have all this volatility and media talk before the big one even happens. Dot com crash was a more of a low steady early drop before it really fell apart. 2008 had normal correction style drop, normal post correction bounce, VIOLENT DROP again, bounce, and another death drop once more with feeling.
Skimming through S&P weekly chart going all the way back to the 70's, it seems there is a level that, once broken, means liquidate all longs and start shorting everything: 200 week simple moving average. If the S&P breaks below that line, there is a high probability of serious crash to follow. Incidentally, the 200 week is exactly where the 2018 drop found low support.